Development of Mathematics e-Modules based on PjBL STEM on Materials Constructing Flat Side Spaces to Improve Mathematical Communication Ability of Junior High School Students

Seftiana Wandani; Reza Kusuma Setyansah; Titin Masfingatin

doi:10.35445/alishlah.v15i1.2497

Development of Mathematics e-Modules based on PjBL STEM on Materials Constructing Flat Side Spaces to Improve Mathematical Communication Ability of Junior High School Students

Seftiana Wandani, Reza Kusuma Setyansah, Titin Masfingatin

Abstract

This development research aims: 1) To find out the validity, practicality, and effectiveness of the PjBL STEM-based Mathematics e-Module on the material of Constructing Flat Side Spaces. 2) Knowing the increase in mathematical communication skills of class VIII B students of SMPN 2 Sawahan after using the PjBL STEM-based Mathematics e-Module. The development model in this research uses 4D which consists of Define, Design, Development, and Dissemination. The instruments used include a learning device validation sheet to determine the validity of the developed e-module, student response questionnaires to determine the practicality of the developed e-module, and learning outcomes tests to determine the effectiveness of the developed e-module. The results showed: 1) the PjBL STEM-based Mathematics e-Module on the Flat Sided Space Building material met the validity criteria, the average validation sheet obtained a value of 94% with the "very valid" category, and the practicality criteria obtained from the student response questionnaire sheet reached a score of 62 % in the field trial with the practical category, and the effectiveness criteria tested using the t-test met the specified criteria, the post-test value of the experimental class was 4.75 greater than the control class and the p-value = 0.015 <0.05 means that there is a difference in scores student learning outcomes significantly in the experimental class and control class. 2) The improvement of students' mathematical communication skills can be seen after using the developed e-Module. This can be seen from the results of the normalized gain test with an average N-Gain score of 0.63 (medium level of interpretation). So that it proves that the development of e-Modules developed can improve students' communication skills. Based on the results of the study, it is concluded that the PjBL STEM-based Mathematics e-Module developed by researchers can improve students' mathematical communication skills and is suitable for use in learning

Keywords

e- Module Mathematics; Pjbl STEM; Build A Flat Side Room; Mathematical Communication Skills;

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DOI: https://doi.org/10.35445/alishlah.v15i1.2497