This research is conducted in order to set up a mathematics learning kit for junior
high school on Pythagorean theorem material with computer-assisted media, which
is valid, practical, and effective in terms of students’ learning achievement and
mathematics self-efficacy.
This research is a developmental research consisting of four phases: define, design,
develop, and disseminate. The subjects consisted: nine students in the small trial
group and 30 students in the field trial group. The experiment was conducted at SMP
Negeri 2 Banyubiru, Kabupaten Semarang. The instruments used in this research
was a validation sheet, teacher assessment sheet, student assessment sheet, teacher
activities observation sheet, student’s activities observation sheet, and mathematics
self-efficacy questionnaire. The data were collected from those instruments.
The results show that the developed learning kit is valid, practical, and effective in
terms of students’ achievement and mathematics self-efficacy scores. The developed
kit consists of a syllabus, lesson plans, worksheets, and instructional media and
according to expert’s validation it is very valid. The evaluation of teachers and
students, the observation of the activities of teachers and students show that the
developed teaching kit is in the minimum practical criteria. At the end of the
learning activities, a final test was administered and the questionnaire was done to
see students' mathematics self-efficacy, and the results are 76.67% of the students
obtained the final test score exceeding the minimum achievement criterion, and
83.34% of the students had a score of mathematics self-efficacy at high or very high
criteria
