PENGEMBANGAN MODUL BIOLOGI BERBASIS PJBL-STEM UNTUK MENINGKATKAN MOTIVASI DAN HASIL BELAJAR PESERTA DIDIK KELAS X MATERI PENCEMARAN AIR

This research aimed to develop a Project-Based Learning (PjBL) and Science, Technology, Engineering, and Mathematics (STEM)-based biology module to improve the motivation and learning outcomes of tenth-grade students concerning water pollution. This study employed a Research and Development (R&D) methodology, utilizing the ADDIE development model, which comprises five stages: Analysis, Design, Development, Implementation, and Evaluation. Additionally, a quasi-experimental research design, specifically a one-group pre-test and post-test design, was used to assess the effectiveness of the developed PjBL-STEM-based biology modules. Data were collected through observation, interviews, and validation by material experts, media and language experts, practitioner experts, and student response questionnaires.
The validity test results from subject matter experts indicated 83% (categorized as "very valid"), while media and language experts rated it 91% ("very valid"). The combined recapitulation of validity results from material, media, and language experts showed that the PjBL-STEM-based biology module achieved an overall score of 87%, falling into the "very valid" category. Practicality, assessed by practitioner experts and student responses, yielded a score of 91%, classifying the module as "efficient." Furthermore, the PjBL-STEM-based biology module was declared effective, demonstrating a significant positive impact on students' learning motivation (89%), categorized as "very good" and an increase in student learning outcomes (75%), high gain category based on pre-test and post-test results in biology learning. Statistical t-test results confirmed a significant influence on student learning outcomes before (pre-test) and after (post-test) using the PjBL-STEM-based biology module. These findings indicate that the developed PjBL-STEM-based biology module is feasible for use in the biology learning process to enhance student motivation and learning outcomes.