摘要：The background of this study was the lack of the effective use of student worksheets in schools.This study was a development research.Meanwhile,the developed and tested product was in the form of guided inquiry-based worksheets on Algebra material for eighth grade of Junior High School (MTs) students.The development model was ADDIE (Analysis,Design,Development,Implementation,and Evaluation).The purpose of this study was to develop guided inquiry-based worksheets for validity,practicality,and effectiveness to help VIII grade MTs students to be more understanding on algebra material.The subject of this study was the eighth grade students of MTs 1 Landak.While the instruments used were validation and observation sheets,and learning outcome tests.Firstly,the results of instrument validation were categorized as valid with the level of material validation of 76.25% and media validation of 78.7%.Secondly,the observation result of student’s worksheets implementation of practical level was 78.3%.Thirdly,the average of learning test results was 77.7 with a percentage of classical completeness of students by 80%.In brief,the test results indicated that students’ worksheet is included in sufficient category.
