Engaging STEM Learning Experience of Spatial Ability through Activities with Using Math Trail

: Math trail is a type of outdoor activity conducted in groups. Group members work together, communicate, and ﬁnd common and best strategies for solving problems. Thus, it combines the use of mathematics in real life with a pleasant walk. Pupils have the opportunity to explore mathematics linked to real objects, solving standard and non-standard problems. Teachers, in turn, can use mathematics in this way as a tool to connect it to other STEM disciplines. This article ﬁrst describes the results of research aimed at assessing spatial ability and mental rotation in students at technical vocational schools in Slovakia. A stereometry test was solved by 455 students. We then created a mathematical walk aimed at developing students’ spatial ability. The experiences presented in the article may be helpful as other mathematics’ popularization stimuli. We believe that when students are engaged in problem-based learning activities that are related to STEM disciplines, in particular, by connecting with the subjects in the problem context of the real world, STEM disciplines may become more important for students. Interdisciplinary STEM learning imitates authentic real-world problem-solving.


Introduction
Interest in improving STEM education continues to grow in many countries. Improving STEM education can also increase technology and science literacy for all people across the population [1].
Researchers in the education field point out that teachers do not know how to form connections between STEM disciplines [2]. STEM education is an approach to teaching and learning that is a unique combination of science, technology, engineering, and mathematics [3]. Consequently, students show very little interest in science and mathematics, often learning these subjects in isolation and in a disconnected way (i.e., without links to cross-curricular concepts and applications of the real world) [4]. Recently, STEM education has focused on improving science and mathematics, not treating them as isolated disciplines [5]. In [6], it is stated that integrated STEM education is an approach that explores teaching and learning between two or more STEM-related subject areas. Additionally, also between STEM subjects and one or more subjects taught at school. Mathematics is a crucial part of the STEM areas, but also of other teaching subjects, as stated in [7].
Mathematics is considered difficult to implement into STEM lesson plans. When connections between mathematics and other STEM disciplines are required, teachers typically use mathematics only as a tool or an algorithmic method [8].
We have presented the results published in the paper in two levels. The first level consists of a stereometry test, containing four tasks exploring students' spatial abilities to solve space-related problems. Given the unfavorable results and our findings, we

Materials and Methods
The research consists in determining the achievement of students in a stereometry test who attend technical vocational schools.

Research Objectives
The objectives of this research are: • to determine a successful stereometry test of students at technical vocational schools; • to design a math trail featuring spatial abilities.

Description of the Research Sample
The research was carried out in 2022 (from May to September) and the sample consisted of 455 second-and third-year students at technical vocational schools. The students were selected from these fields of study: mechanical engineering, the construction industry, operators of construction production, geodesy, cartography and land register, technical and information services, and technical lyceum.
We have created a stereometry test based on the analysis of state educational programs. The stereometry test contains four tasks that examine students' spatial abilities, and the test also examines students' ability to solve spatial displaying tasks.

Research Tools
The stereometry test (see Appendix A) contains four stereometrical tasks. All tasks are related to the spatial abilities of the students.
The first task is focused on constructing a plane intersection of the cube by three points of a given plane. This task was also aimed at marking the visibility of sides to the resulting polygon intersection. The first task was divided into two subtasks. There was a non-standard view of the cube (bottom left view of the cube) and a standard view of the cube (top right view of the cube). The second task was oriented to find the vertices of two points, which are located at the edges of a given solid (rectangular prism). The third task dealt with choosing the correct options for the different views of the object (top, front, and   We scored the tasks in such a way that each of the following steps was assigned one point. Each student could achieve a maximum of 12 points in total (see Figure 3):   points, which are located at the edges of a given solid (rectangular prism). The third task dealt with choosing the correct options for the different views of the object (top, front, and side) from the given alternatives. The fourth task is targeted on drawing the correct top view, front view, and side view of the given object.

Quantitative Analysis
We evaluated the tasks using a quantitative assessment standard. We can see the students' success in solving the stereometry test in Figure 1. This graph shows correct solutions, incorrect solutions, and not-yet-started solutions. We can see that students had problems with solving Task 1(a) and Task 1(b), which were solved correctly by only 3.31% and 11.76% of them, respectively. More successful was the task where the cube was given in the standard view mostly used in the teaching process.   We scored the tasks in such a way that each of the following steps was assigned one point. Each student could achieve a maximum of 12 points in total (see Figure 3): • construct a plane intersection of the cube (Task 1a); • mark the visibility of sides to the resulting polygon intersection (Task 1a); • construct a plane intersection of the cube (Task 1b); • mark the visibility of sides to the resulting polygon intersection (Task 1b); • find the vertices of the points X (Task 2); • find the vertices of the points F (Task 2); We scored the tasks in such a way that each of the following steps was assigned one point. Each student could achieve a maximum of 12 points in total (see Figure 3):  We also used statistical implicative analysis methods to evaluate the results; specifically, we used statistical software CHIC. For this evaluation, we need didactic variables, and these didactic variables are present in Table 1.

Task Didactic Variables
Task 1a (type U1A) U1A-students' correct solution of Task 1(a) U1A_r-correctly constructing a plane intersection of the cube by three points of that given plane of Task 1(a) U1A_v-correctly marking the visibility of sides to the resulting polygon intersection of Task 1(a) Task 1b (type U1B) U1B-students´ correct solution of Task 1(b) U1B_r-correctly constructing a plane intersection of the cube by three points of that given plane od Task 1(b) U1B_v-correctly marking the visibility of sides to the resulting polygon intersection of Task 1(b)  We also used statistical implicative analysis methods to evaluate the results; specifically, we used statistical software CHIC. For this evaluation, we need didactic variables, and these didactic variables are present in Table 1.

Task Didactic Variables
Task 1a (type U1A) U1A-students' correct solution of Task 1(a) U1A_r-correctly constructing a plane intersection of the cube by three points of that given plane of Task

Statistical Processing of the Obtained Data
The statistical program CHIC was used to analyze individual steps of student solutions to tasks. The didactic variables mentioned above were used to create implicative trees. Figure 4 shows the relationship between the correct solutions of the tasks. An implication tree is given there for the complete correct solution of all tasks. We used the statistical program CHIC to analyze individual steps of student solutions to tasks. The didactic variables mentioned above were used to create implicative trees. Figure 4 shows the relationship between the correct solutions of the tasks. An implication tree is given there for the complete correct solution.
Mathematics 2023, 11, x FOR PEER REVIEW 5 of 17 U4_b-correctly drawing the side view of the given object of Task 4

Statistical Processing of the Obtained Data
The statistical program CHIC was used to analyze individual steps of student solutions to tasks. The didactic variables mentioned above were used to create implicative trees. Figure 4 shows the relationship between the correct solutions of the tasks. An implication tree is given there for the complete correct solution of all tasks. We used the statistical program CHIC to analyze individual steps of student solutions to tasks. The didactic variables mentioned above were used to create implicative trees. Figure 4 shows the relationship between the correct solutions of the tasks. An implication tree is given there for the complete correct solution. The implication relation U1A→U3 (cohesion: 0.974) shows that if students correctly constructed a plane intersection of the cube by three points of a given plane and marked the visibility of sides to the resulting polygon intersection in Task 1a), they correctly chose options of the different view of the object in Task 3.
In Figure 5, we present an implication tree that represents an individual strategies analysis of the student´s solutions. There is the implication 2_ − 2_ . We can see that if the student correctly finds the vertices of point F that student correctly finds the vertices of point X (cohesion: 1). The implications 1 _ → 1 _ (cohesion: 1) and 1 → 1 (cohesion: 1) show that if students correctly constructed a plane intersection of the cube by three points of a given plane, then the students marked the visibility of the sides to the resulting polygon intersection. The implication relation U1A→U3 (cohesion: 0.974) shows that if students correctly constructed a plane intersection of the cube by three points of a given plane and marked the visibility of sides to the resulting polygon intersection in Task 1a), they correctly chose options of the different view of the object in Task 3.
In Figure 5, we present an implication tree that represents an individual strategies analysis of the student s solutions. U4_b-correctly drawing the side view of the given object of Task 4

Statistical Processing of the Obtained Data
The statistical program CHIC was used to analyze individual steps of student solutions to tasks. The didactic variables mentioned above were used to create implicative trees. Figure 4 shows the relationship between the correct solutions of the tasks. An implication tree is given there for the complete correct solution of all tasks. We used the statistical program CHIC to analyze individual steps of student solutions to tasks. The didactic variables mentioned above were used to create implicative trees. Figure 4 shows the relationship between the correct solutions of the tasks. An implication tree is given there for the complete correct solution. The implication relation U1A→U3 (cohesion: 0.974) shows that if students correctly constructed a plane intersection of the cube by three points of a given plane and marked the visibility of sides to the resulting polygon intersection in Task 1a), they correctly chose options of the different view of the object in Task 3.
In Figure 5, we present an implication tree that represents an individual strategies analysis of the student´s solutions. There is the implication 2_ − 2_ . We can see that if the student correctly finds the vertices of point F that student correctly finds the vertices of point X (cohesion: 1). The implications 1 _ → 1 _ (cohesion: 1) and 1 → 1 (cohesion: 1) show that if students correctly constructed a plane intersection of the cube by three points of a given plane, then the students marked the visibility of the sides to the resulting polygon intersection. There is the implication U2_F − U2_X. We can see that if the student correctly finds the vertices of point F that student correctly finds the vertices of point X (cohesion: 1). The implications U1B_v → U1B_r (cohesion: 1) and U1Av → U1Ar (cohesion: 1) show that if students correctly constructed a plane intersection of the cube by three points of a given plane, then the students marked the visibility of the sides to the resulting polygon intersection.
The implications U3_b → U3_n (cohesion: 1) and U4b → U4n (cohesion: 1) show that if students correctly choose or draw the side view of the given object then students correctly choose or draw the front view of the given object.
Since Figure 1 shows that the students have success less than 79.96% in Task 3 and less than 71.14% in Task 4. We created a math trail which could support students' spatial abilities. Students can see the use of theoretical spatial ability knowledge in real situations and objects by realizing the math trail. This math trail is called "Math trail on the L'udovít Štúr square in Bánovce and Bebravou" and it is focused on developing spatial abilities in city streets. The math trail is available to all in the MathCityMap application. Anyone can search for it by the name of the walk or by using the code 3514190.

Description of the Math Trail with an Emphasis on Developing Spatial Abilities in City Streets
In [15], five components of spatial ability are differentiated. They are spatial perception, visualization, mental rotation, spatial relations, and spatial orientation.
The mental processes of the elements of spatial abilities are either dynamic or static. The test person's spatial position is an outside or inside position. We can see this in Table 2, which shows an overview of the elements of spatial ability [15]. During a math trail, students can solve mathematical problems related to real objects. It is one of the types of outdoor education. Students use mobile technologies during the math trail. Each task in the MathCityMap contains these main points: task assignment, task type, as well as hints. A sample solution to the task is also presented [16].
We created a math trail on the L'udovít Štúr square in Bánovce and Bebravou (a town in Slovakia). It is a math trail focused on spatial ability, stereometry, and descriptive geometry. It will be solved by secondary-school students. The math trail comprises six tasks related to real objects located on the square. Each task is focused on one of the elements of spatial ability. We present the individual tasks together with elements of spatial ability.

Task Related to Visualization
Task assignment: The figure of L'udovít Štúr is placed on a pedestal in the shape of a truncated cone (see Figure 6). His cloak extends to the upper base of this pedestal. The cone is imaginatively formed from the pedestal (a truncated cone). Compare the height of the cone and Štúr's coat. Approximately, what is the ratio of the height of the cone and the length of L'udovít Štúr's coat?
The implications 3_ → 3_ (cohesion: 1) and 4 → 4 (cohesion: 1) show that if students correctly choose or draw the side view of the given object then students correctly choose or draw the front view of the given object.
Since Figure 1 shows that the students have success less than 79.96% in Task 3 and less than 71.14% in Task 4. We created a math trail which could support studentsʹ spatial abilities. Students can see the use of theoretical spatial ability knowledge in real situations and objects by realizing the math trail. This math trail is called "Math trail on the Ľudovít Štúr square in Bánovce and Bebravou" and it is focused on developing spatial abilities in city streets. The math trail is available to all in the MathCityMap application. Anyone can search for it by the name of the walk or by using the code 3514190.

Description of the Math Trail with an Emphasis on Developing Spatial Abilities in City Streets
In [15], five components of spatial ability are differentiated. They are spatial perception, visualization, mental rotation, spatial relations, and spatial orientation.
The mental processes of the elements of spatial abilities are either dynamic or static. The test personʹs spatial position is an outside or inside position. We can see this in Table  2, which shows an overview of the elements of spatial ability [15]. During a math trail, students can solve mathematical problems related to real objects. It is one of the types of outdoor education. Students use mobile technologies during the math trail. Each task in the MathCityMap contains these main points: task assignment, task type, as well as hints. A sample solution to the task is also presented [16].
We created a math trail on the Ľudovít Štúr square in Bánovce and Bebravou (a town in Slovakia). It is a math trail focused on spatial ability, stereometry, and descriptive geometry. It will be solved by secondary-school students. The math trail comprises six tasks related to real objects located on the square. Each task is focused on one of the elements of spatial ability. We present the individual tasks together with elements of spatial ability.

Task Related to Visualization
Task assignment: The figure of Ľudovít Štúr is placed on a pedestal in the shape of a truncated cone (see Figure 6). His cloak extends to the upper base of this pedestal. The cone is imaginatively formed from the pedestal (a truncated cone). Compare the height of the cone and Štúrʹs coat. Approximately, what is the ratio of the height of the cone and the length of Ľudovít Štúr's coat?  Students were offered the following type of answer-multiple choice and these hints: 1/6 or 10-13%, or 1/7 or 14-16%, or 40-50%, or 25-30%; • hint 1: you take a photo of the memorial and on the photo you mark the approximate top of the cone; • hint 2: L'udovít has his coat on and his cloak billows behind him. A sample solution to the task is shown in Figure 7 and the result is 10-13%.
Students were offered the following type of answer-multiple choice and these hints: • 1/6 or 10-13%, or 1/7 or 14-16%, or 40-50%, or 25-30%; • hint 1: you take a photo of the memorial and on the photo you mark the approximate top of the cone; • hint 2: Ľudovít has his coat on and his cloak billows behind him. A sample solution to the task is shown in Figure 7 and the result is 10-13%.

Task Related to Mental Rotation
Task assignment: Move your finger on the map from your current location. Walk down the street going in the south-west direction. Turn left at the nearest Y-shaped crossroads. Then, go to the nearest crossroads and continue straight. Now, you are near a block of flats that looks similar to a star. Turn right, and continue along the street. At the second crossroads, turn around the perimeter of the grass quadrangle. Move along the street called K. Zornici. Next to the pharmacy, turn south-east. At the intersection of your street with Radiša, walk to the river and follow the flow of the river. On the second bridge, go along the street to the north-west. When the name of the street changes, walk on the street named after A. Braxatoris. Then, walk into the parking area. Now, you have walked the entire street named after one Slovak poet. Where did you end your walk?
Students were offered multiple-choice-type answers and they were given these hints: • ODES, or Tesco, or a sports hall (on the map: "športová hala") or Lidl, or ADM motor, or the Ľudovít Štúr square (on the map: "Námestie Ľudovíta Štúra"), or a post office (on the map: "Pošta"); • hint 1: the compass on the map will help you; • hint 2: two blocks of flats that look similar to a star with 12 floors are also located at the Vystrkov-Strážovská-Na vrštek crossroads.

Task Related to Mental Rotation
Task assignment: Move your finger on the map from your current location. Walk down the street going in the south-west direction. Turn left at the nearest Y-shaped crossroads. Then, go to the nearest crossroads and continue straight. Now, you are near a block of flats that looks similar to a star. Turn right, and continue along the street. At the second crossroads, turn around the perimeter of the grass quadrangle. Move along the street called K. Zornici. Next to the pharmacy, turn south-east. At the intersection of your street with Radiša, walk to the river and follow the flow of the river. On the second bridge, go along the street to the north-west. When the name of the street changes, walk on the street named after A. Braxatoris. Then, walk into the parking area. Now, you have walked the entire street named after one Slovak poet. Where did you end your walk?
Students were offered multiple-choice-type answers and they were given these hints: • ODES, or Tesco, or a sports hall (on the map: "športová hala") or Lidl, or ADM motor, or the L'udovít Štúr square (on the map: "Námestie L'udovíta Štúra"), or a post office (on the map: "Pošta"); • hint 1: the compass on the map will help you; • hint 2: two blocks of flats that look similar to a star with 12 floors are also located at the Vystrkov-Strážovská-Na vrštek crossroads.

Task Related to Spatial Orientation
Task assignment: The Church of the Most Holy Trinity which stands in Bánovce to this day was built in 1803 in a classical style. Formerly an older Baroque church stood on the same spot. The old Baroque church was not oriented according to the typical Baroque orientation. The last rays of the sun entered the church through the side door. The front door under the tower were located on the north side. Look at the new Church of the Most

Task Related to Spatial Orientation
Task assignment: The Church of the Most Holy Trinity which stands in Bánovce to this day was built in 1803 in a classical style. Formerly an older Baroque church stood on the same spot. The old Baroque church was not oriented according to the typical Baroque orientation. The last rays of the sun entered the church through the side door. The front door under the tower were located on the north side. Look at the new Church of the Most Holy Trinity (Figure 9). Compare the axis of the old church and the main axis of the new church. Calculate the difference between these axes. Write the difference in the positive direction of the oriented angle by integers without the symbol of degree.

Task Related to Spatial Orientation
Task assignment: The Church of the Most Holy Trinity which stands in Bánovce to this day was built in 1803 in a classical style. Formerly an older Baroque church stood on the same spot. The old Baroque church was not oriented according to the typical Baroque orientation. The last rays of the sun entered the church through the side door. The front door under the tower were located on the north side. Look at the new Church of the Most Holy Trinity (Figure 9). Compare the axis of the old church and the main axis of the new church. Calculate the difference between these axes. Write the difference in the positive direction of the oriented angle by integers without the symbol of degree. This task required a written answer. The students' answers had to fit into a given interval shown in the Figure 10. The orange-colored interval indicates a not perfect, but correct, answer, and the green-colored interval indicates a more precise answer. Students were also offered hints: • hint 1: you can use your knowledge of the location to find where the sun sets, find a map of the square, or use the compass on your phone; • hint 2 and hint 3 were in the form of pictures, which we can see in Figure 11. This task required a written answer. The students' answers had to fit into a given interval shown in the Figure 10. The orange-colored interval indicates a not perfect, but correct, answer, and the green-colored interval indicates a more precise answer.

Task Related to Spatial Orientation
Task assignment: The Church of the Most Holy Trinity which stands in Bánovce to this day was built in 1803 in a classical style. Formerly an older Baroque church stood on the same spot. The old Baroque church was not oriented according to the typical Baroque orientation. The last rays of the sun entered the church through the side door. The front door under the tower were located on the north side. Look at the new Church of the Most Holy Trinity (Figure 9). Compare the axis of the old church and the main axis of the new church. Calculate the difference between these axes. Write the difference in the positive direction of the oriented angle by integers without the symbol of degree. This task required a written answer. The students' answers had to fit into a given interval shown in the Figure 10. The orange-colored interval indicates a not perfect, but correct, answer, and the green-colored interval indicates a more precise answer. Students were also offered hints: • hint 1: you can use your knowledge of the location to find where the sun sets, find a map of the square, or use the compass on your phone; • hint 2 and hint 3 were in the form of pictures, which we can see in Figure 11. Students were also offered hints: • hint 1: you can use your knowledge of the location to find where the sun sets, find a map of the square, or use the compass on your phone; • hint 2 and hint 3 were in the form of pictures, which we can see in Figure 11.  We present a sample solution out of interest and a description of the student's solution to the task. First, you determine the orientation of the old church. The front door under the tower was oriented to the north and the side door was oriented to the west. Secondly, we determine the orientation of the new church. We can use a well-known fact about where the sun sets, find a map of the square, or, simply, use a compass on a phone. We draw the orientation of both the old church and the new church on paper and calculate the difference.

Task Related to Spatial Perception
Task assignment: The trunk of the well-known planetree of Bánovce (see in Figure  12) is surrounded by a curb. A tactile path is also built near it. Find the point of the curb which is closest to the tactile path. Hold a camera lens at a height of one meter above this point. Take a photo. You will see a monoclinic one-point linear perspective, horizon, vanishing point line, and a vanishing point. Choose the correct options. Where is the vanish- We present a sample solution out of interest and a description of the student's solution to the task. First, you determine the orientation of the old church. The front door under the tower was oriented to the north and the side door was oriented to the west. Secondly, we determine the orientation of the new church. We can use a well-known fact about where the sun sets, find a map of the square, or, simply, use a compass on a phone. We draw the orientation of both the old church and the new church on paper and calculate the difference.

Task Related to Spatial Perception
Task assignment: The trunk of the well-known planetree of Bánovce (see in Figure 12) is surrounded by a curb. A tactile path is also built near it. Find the point of the curb which is closest to the tactile path. Hold a camera lens at a height of one meter above this point. Take a photo. You will see a monoclinic one-point linear perspective, horizon, vanishing point line, and a vanishing point. Choose the correct options. Where is the vanishing point in the photo located?
Secondly, we determine the orientation of the new church. We can use a well-known fact about where the sun sets, find a map of the square, or, simply, use a compass on a phone. We draw the orientation of both the old church and the new church on paper and calculate the difference.

Task Related to Spatial Perception
Task assignment: The trunk of the well-known planetree of Bánovce (see in Figure  12) is surrounded by a curb. A tactile path is also built near it. Find the point of the curb which is closest to the tactile path. Hold a camera lens at a height of one meter above this point. Take a photo. You will see a monoclinic one-point linear perspective, horizon, vanishing point line, and a vanishing point. Choose the correct options. Where is the vanishing point in the photo located? Figure 12. The main photo of the object (plane tree) from the task related to static mental processes (linear perspective).
The students were given multiple-choice-type answers and the following hints: • the grocery store Coop Jednota, a hill in the background of the apartment buildings, trees in the foreground of the apartment buildings, one of the trees in the square in a row with the same curb as the planetree, the sky above the hill, or the department store Tesco; • hint 1 and hint 2: see Figure 13.  The students were given multiple-choice-type answers and the following hints: • the grocery store Coop Jednota, a hill in the background of the apartment buildings, trees in the foreground of the apartment buildings, one of the trees in the square in a row with the same curb as the planetree, the sky above the hill, or the department store Tesco; • hint 1 and hint 2: see Figure 13.
Secondly, we determine the orientation of the new church. We can use a well-known fact about where the sun sets, find a map of the square, or, simply, use a compass on a phone. We draw the orientation of both the old church and the new church on paper and calculate the difference.

Task Related to Spatial Perception
Task assignment: The trunk of the well-known planetree of Bánovce (see in Figure  12) is surrounded by a curb. A tactile path is also built near it. Find the point of the curb which is closest to the tactile path. Hold a camera lens at a height of one meter above this point. Take a photo. You will see a monoclinic one-point linear perspective, horizon, vanishing point line, and a vanishing point. Choose the correct options. Where is the vanishing point in the photo located? Figure 12. The main photo of the object (plane tree) from the task related to static mental processes (linear perspective).
The students were given multiple-choice-type answers and the following hints: • the grocery store Coop Jednota, a hill in the background of the apartment buildings, trees in the foreground of the apartment buildings, one of the trees in the square in a row with the same curb as the planetree, the sky above the hill, or the department store Tesco; • hint 1 and hint 2: see Figure 13.  A sample solution is shown in Figure 14, where there are trees in the foreground of the apartment buildings. A sample solution is shown in Figure 14, where there are trees in the foreground of the apartment buildings.

Task Related to Spatial Relations
We created two tasks related to spatial relations present in the math trails. Their assignments are listed below with hints that were given to the students and the solutions.

Task Related to Spatial Relations
We created two tasks related to spatial relations present in the math trails. Their assignments are listed below with hints that were given to the students and the solutions.

Task Related to Spatial Relations
We created two tasks related to spatial relations present in the math trails. Their assignments are listed below with hints that were given to the students and the solutions.
Task 1: The central object of the town is the Church of the Most Holy Trinity ( Figure  15). It was built in 1803. Pictures of different ground plans of the church are in the hints. Mark the correct top view of the church in the answers. Students had to find the orthogonal projection of the church into the plane. The type of answer (multiple choice) and hints can be seen in Figure 16.  Figure 17). There is a top view and a roof plan of the building in the hints. Using the hints, try to choose and mark the correct top view and roof plan for the historical building. Students had to find the orthogonal projection of the church into the plane. The type of answer (multiple choice) and hints can be seen in Figure 16.

Task Related to Spatial Relations
We created two tasks related to spatial relations present in the math trails. Their assignments are listed below with hints that were given to the students and the solutions.
Task 1: The central object of the town is the Church of the Most Holy Trinity ( Figure  15). It was built in 1803. Pictures of different ground plans of the church are in the hints. Mark the correct top view of the church in the answers. Students had to find the orthogonal projection of the church into the plane. The type of answer (multiple choice) and hints can be seen in Figure 16.

Score of Components of Spatial Ability
We have created a graph (see Figure 19) that shows the score in percentages for each component of spatial ability related to task-solving from our math trail.

Score of Components of Spatial Ability
We have created a graph (see Figure 19) that shows the score in percentages for each component of spatial ability related to task-solving from our math trail.

Score of Components of Spatial Ability
We have created a graph (see Figure 19) that shows the score in percentages for each component of spatial ability related to task-solving from our math trail.
(a) (b) Figure 18. (a) Hints and all answers of the task related to static mental processes (orthographic projection with roof plan); (b) correct roof plan marked in the real photo of the building.

Score of Components of Spatial Ability
We have created a graph (see Figure 19) that shows the score in percentages for each component of spatial ability related to task-solving from our math trail. This graph shows that spatial perception scores the highest among the five components of spatial ability listed in Table 2. The graph also reveals that the score of spatial orientation is the lowest among the components of spatial ability.

Conclusions
Schools have been teaching mathematics the traditional way for a very long time. Hence, is mathematics crucial in STEM? We believe that such an explanation provides additional educational benefits through the STEM model, but it is different. It is important to note that the traditional method of teaching mathematics is inevitable. As stated in [17], there is abundant empirical evidence of a significant correlation between spatial ability, Figure 19. Score of the components of spatial ability.
This graph shows that spatial perception scores the highest among the five components of spatial ability listed in Table 2. The graph also reveals that the score of spatial orientation is the lowest among the components of spatial ability.

Conclusions
Schools have been teaching mathematics the traditional way for a very long time. Hence, is mathematics crucial in STEM? We believe that such an explanation provides additional educational benefits through the STEM model, but it is different. It is important to note that the traditional method of teaching mathematics is inevitable. As stated in [17], there is abundant empirical evidence of a significant correlation between spatial ability, which is a part of mathematics, and educational performance in STEM. STEM is a comprehensive approach that integrates disciplines to make learning connected, focused, relevant, and meaningful for students.
Our test results show a lack of spatial ability and mental rotation in pupils which is also one of the crucial components of spatial ability. We also think that geometry teaching needs to be linked to the real world and activities. Everyday activities require spatial ability. This ability is a major factor in mathematics because it is used to understand the properties of objects, such as their position, size, and shape, as well as the relationships between objects.
We have also found that incorporating outdoor activities, such as math trails, can help to develop spatial ability in a non-formal context. This finding is beneficial for stereometry and mathematics proficiency more generally. We can also conclude that the motivation of students increased during the experience, despite the problems of the trail not being easy for all students.
The math trail was created as one of many activities that can develop a student's spatial ability. Our most important findings are based on the results of the stereometry test as well as the realization of the math trail. The score in the stereometry test and the math trail for spatial orientation is the lowest of the other components of spatial ability. The achievement of students in tasks in the stereometry test related to spatial relations is almost 80%. We can also see the achievement of students in tasks related to spatial relations is close to 85%. We can state that the results are comparable. We can state that the important relationship between spatial orientation and spatial relation was shown to be similar in both the stereometry test and the math trail. Similarly, it shows that the achievement of students in tasks related to spatial orientation is lower than the achievement of students in tasks related to visualization. This comparison of achievements of students in solving tasks related to spatial orientation and visualization was shown in solving tasks in the stereometry test and tasks in the math trail as well. Although the cohesion in the implication graph is not significant, we can see that there is some relationship between spatial orientation and visualization. These findings are well grounded by the graphs we have presented.
Our results show students developing a more positive attitude towards geometry, broadening their perspective about the connections between mathematics, other school subjects, and also everyday life.

Conflicts of Interest:
The authors declare no conflict of interest.

Appendix A
Stereometry test for students.

Task 1(a)
Construct a plane intersection of the cube by three points of that plane BXY. Mark the visibility of sides to the resulting polygon intersection.

Task 1(b)
Construct a plane intersection of the cube by three points of that plane . Mark the visibility of sides to the resulting polygon intersection.

Task 1(b)
Construct a plane intersection of the cube by three points of that plane XYZ. Mark the visibility of sides to the resulting polygon intersection.

Task 1(b)
Construct a plane intersection of the cube by three points of that plane . Mark the visibility of sides to the resulting polygon intersection.

Task 4
Draw the top view of the given object, front view of the given object, and also side view of the given object.

Appendix B
Math trail with an emphasis on developing spatial abilities in city streets.

Task 4
Draw the top view of the given object, front view of the given object, and also side view of the given object.

Task 4
Draw the top view of the given object, front view of the given object, and also side view of the given object.

Appendix B
Math trail with an emphasis on developing spatial abilities in city streets.

Appendix B
Math trail with an emphasis on developing spatial abilities in city streets.

Appendix B
Math trail with an emphasis on developing spatial abilities in city streets.

Task 6:
The Church of the Most Holy Trinity-astronomical orientation. Figure A12. Task 6 in mobile application. Figure A12. Task 6 in mobile application.