Development Student Activity Sheet of Natural Sciences with Authentic Inquiry Learning Approach to Improve Problemsolving Skills of Junior High School Students

This study aims to determine the feasibility of the Student Activity Sheet with authentic inquiry learning approach based on the results of the expert judgment assessment and also the students' responses as well as to determine the improvement of problem-solving skills. This research is a development research (R&D) with a 4-D (four-D) model. The stages of this research included to define, design and develop. Research subjects were the experts, science teachers, and students of class VIII B of SMPN 14 Yogyakarta. The research instruments used were the Student Activity Sheet of expert and teacher validation instrument, students' responses instrument, problem-solving skills observation sheets, and problem-solving skills pretest-posttest. The analytical techniques used included the average score to determine the actual score, the conversion of scores into four categories, the calculation of the percentage of mastery of problem-solving skills and the gain score of the mastery of problem-solving skills. Furthermore, the Student Activity Sheet was developed and considered very good by experts and teachers as well as suitable for use in natural sciences learning. (2) The students gave very good responses to the Natural Sciences Subject Student Activity Sheet with authentic inquiry learning approach from the results of development, (3) the improvement of students' problem-solving skills in Natural Sciences learning with authentic inquiry learning gained an increase of 17.8% and the gain score of 0.74 which is included in the "high" category.