<![CDATA[This study aimed to develop and evaluate the validity and practicality of an electronic Student Worksheet (e-SW) integrating Project-Based Learning (PjBL) and STEM using the Liveworksheets platform for teaching temperature and heat to seventh-grade junior high school students. This Research and Development (R&D) study employed the ADDIE model. The participants included two expert validators, two science teachers, and 20 students. Data were collected through expert validation sheets and teacher and student practicality questionnaires and analyzed using descriptive percentage analysis. The results indicated that the e-SW demonstrated high validity in terms of visual design, usability, language, content, presentation, and graphics. The material validation confirmed the alignment of the content with learning competencies, indicators, and students’ learning needs, while media validation showed that the design, multimedia elements, and language were appropriate and accessible. The practicality assessment indicated that the e-SW was highly practical. Teachers reported that it was easy to access, provided clear instructions, improved learning-time efficiency, and supported their role as facilitators. Students also found the e-SW easy to use, clearly instructed, and beneficial for understanding temperature and heat and increasing learning engagement. Overall, the PjBL–STEM-based e-SW using Liveworksheets was valid and highly practical for supporting active and meaningful science learning.]]>
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