DEVELOPMENT OF ELECTRONIC STUDENT WORKSHEETS THROUGH NATURAL SCIENCE PROJECT - BASED LEARNING IN ELEMENTARY SCHOOL

. This research aims to produce project - based learning - based electronic learner worksheets as a support for natural science learning materials in the fifth grade of elementary school. Methods used by Research & Development using an approach developed using; Analyze, Design, Develop, Implementation, and Evaluation (ADDIE). This research was held at Munjul State Elementary School 01 East Jakarta. The steps in this study are 1) Conducting needs analysis through interviews and questionnaires, 2) Making product designs, 3) Conducting product development, 4) Conducting trials to learners and 5) Evaluating products. The object in the study was 30 elementary school fifth graders, data analysis techniques using interviews and questionnaires. The results of the development trial were evaluated by media experts 88.5% material experts 84.61% and linguists obtained from an average score of 92.3% with excellent categories, then the results of product trials through one to one got a score of 83.75% with excellent categories and product trial results through small groups got a score of 88.33 % with very good category. This research shows that project - based learning - based electronic learner worksheets are feasible to be used for learning media as an additional source of fifth - grade elementary school natural science learning.


A. INTRODUCTION
The advancement of science and technology globally, has affected all aspects of life, one of which is in the field of education.Technological progress is something that we cannot avoid in this life, because technological progress will go hand in hand with the advancement of science.The existence of technological advances in education has dynamic changes that require students to have creative thinking skills, non-routine thinking skills and have new ideas in dealing with every problem (Surmilasari et al., 2022).Every innovation is designed to bring positive benefits to human life.Various conveniences and new ways in the world of technology, especially the field of education, education is directed to create curiosity in the minds of students and the use of technology can help students understand and maintain concepts better (Raja & Nagasubramani, 2018).
Education is a conscious effort to prepare students through guidance, DOI:https://doi.org/10.17509/e.v21i2.46074 189 Development Of Electronic Student Worksheets Through Natural Science Project-Based Learning In Elementary   School   No. SK Akreditasi Ristekdikti : 34/E/KPT/2018 teaching, and training activities for their role in the future.The school as a formal education, systematically plans an educational environment that provides various opportunities for students to carry out various learning activities (Susandi & Widyawati, 2017).
Therefore, the world of education According to (Fitri et al., 2020) learning natural sciences is still considered difficult by some learners.Given the importance of these lessons, it is highly expected that the role of a teacher in order to determine the approach or model of learning that can change the mindset and views of students towards natural sciences (Saparwadi, 2016) & Martini, 2017).Science process skills also have the potential to develop curiosity in life through scientific attitudes and knowledge gradually (Fransiska, Subagia, et al., 2018).
Natural science emphasizes scientific learning, which involves all aspects of students' ability to process problems and seek information, with the aim that students can think actively, creatively, critically, and solve problems around them scientifically (Widiyanti & Fitrotun Nisa, 2021).Therefore, the process of learning natural sciences carried out in schools must be able to facilitate students to develop their competencies in order to understand the environment scientifically.The material to be used in the study of natural sciences is the respiratory system in humans.
Natural science is essentially a scientific inquiry that provides a direct learning experience through the use of suitable for all levels of education, because according to (Etherington, 2011) explaining learning with project based learning makes students can understand a problem and find solutions so that students learn to be means.Project based learning where the project is not as a goal, but a tool that emphasizes aspects of the learning process (Tascı, 2015).So it can be concluded that, project based learning is a learning method that uses projects as a medium created by students so that students are able to construct their knowledge and skills well.
Project-based learning organizes learning around projects that engage students in real-world situations where they can explore and apply topics to solve complex problems related to the professional practice they are preparing for (Chiang & Lee, 2016).Learning with project-based learning has a positive influence on teachers and learners.
Learners are more active in the learning process, because the project involves the learner as a whole and the context of the material taught according to the real world, as well as teachers will more easily interact and be close to students, encourage students to work well, work meaningfully, and find problems to find (Anazifa & Hadi, 2016).Project based learning is a learning model that is used not only to assess cognitive aspects, but also to assess student work.Project based learning is in accordance with the learning of natural sciences, because it encourages students to discover the facts of a phenomenon or event.
The key to success and progress for the nation is the existence of education that creates more effective methods or applications of learning in accordance with the times (Rahmadhani et al., 2021).
Learning The initial design has been completed and will then lead to a validation process by media experts, material experts and linguists to find out the level of feasibility of using assessment instruments.

Implementation
At this stage, the product is tested to students and teachers of the fifth grade of elementary school after improvements.

Evaluation
At this stage, products that have passed the trial will be implemented in real terms in the class intended as the subject of research.After the electronic learner worksheet is applied in learning, an initial evaluation is carried out to provide feedback on the learning media.
The data analysis technique used to perform data analysis is quantitative descriptive statistics.Assessment uses a rating scale, which is raw data obtained in the form of numbers and then interpreted in a qualitative sense.The assessment uses a rating scale on a scale of 5 consisting of a scale of 1 for Very Less, a scale of 2 for Less, a scale of 3 for Enough, a scale of 4 for Good, and a scale of 5 for Very Good.
Here is the rating scale that is used as a guideline in interpreting eligibility:        The development of project-based learning electronic learner worksheets is useful in learning for teachers and learners can make it easier for teachers to convey materials and as supporting materials about the digestive system in humans.

No Percentage
requires innovation that is in line with the progress of science and technology without neglecting human values.The process and its application must also have maximum renewal, meaning that education must be able to prepare provisions for students to face the current conditions.If education fails to carry out its duties, this means also failure in the lives of students (Ketut Sri Puji Wahyuni et al., 2021).One of the subjects in the 2013 curriculum is natural science.Natural science occupies an important role in the world of education because it becomes the basis and development of other sciences (Putra & Anggraini, 2016).

Figure 5 .
Figure 5. Project creation video view Learners can also be motivated to learn because of the attractive design of electronic learner worksheet displays.Based on the results of research and development that has been carried out by researchers, project-based learning-based DOI:https://doi.org/10.17509/e.v21i2.46074198 Development Of Electronic Student Worksheets Through Natural Science Project-Based Learning In Elementary School No. SK Akreditasi Ristekdikti : 34/E/KPT/2018 electronic learner worksheets that have been developed are preferred by learners and can deliver materials appropriately.D. CONCLUSION Based on the results of development research and discussion about the development of project-based electronic learner worksheets on natural science learning, the conclusions that can be drawn from this study are as follows: This project-based learning electronic learner worksheet development procedure uses the ADDIE development procedure.The development step of electronic learner worksheets is carried out starting from the analysis stage to the development stage, namely expert validation.Based on the development stage, project-based electronic learner worksheets are produced on learning natural sciences digestive system materials in fifth grade elementary school humans.The feasibility of project-based learning-based electronic learner worksheets based on expert assessment of materials reached an average percentage of 84.61% with interpretation criteria is very feasible, media experts provide assessments with an average percentage of 88.5% with very feasible criteria and linguists provide an average percentage of 92.3% with very decent criteria.Thus both the material, media and language e worksheets of project-based learningbased electronic learners have very feasible criteria.

Table 1 .
Rating caleDevelopment Of Electronic Student Worksheets Through Natural Science Project-Based Learning In Elementary School

Table 3 .
Material Expert Test Results

Table 5 .
One to One Test Results

Table 6 .
Small Group Test Results