Untuk menanamkan keterampilan abad 21 kepada siswa selain melalui pendekatan dan model dalam pembelajaran harus dilengkapi dengan bahan ajar yang tepat dan efektif disertai dengan pemanfaatan teknologi agar tujuan pembelajaran lebih mudah tercapai. Berdasarkan hasil analysis ditemukan permasalahan bahwa di sekolah sudah menerapkan pembelajaran berbasis proyek sederhana dengan menggunakan bahan ajar LKPD, namun LKPD yang digunakan belum memfasilitasi siswa dalam membuat proyek yang didalamnya hanya berisi soal-soal umum saja. Hal ini menyebabkan bahan ajar yang digunakan belum spesifik untuk memfasilitasi siswa dalam membuat proyek. Tujuan penelitian ini yaitu untuk mengembangkan E-LKPD berbasis proyek terintegrasi STEM pada materi perubahan lingkungan. Penelitian ini merupakan penelitian Research & Development (R&D) dengan model pengembangan ADDIE yang terdiri atas tahap analysis, design, development, implementation, evaluation. Instrumen yang digunakan dalam penelitian ini yaitu lembar analisis kebutuhan, lembar validasi ahli materi, ahli media, ahli pendidikan, dan angket respon guru dan siswa. Tahap uji coba dilakukan kepada 36 orang siswa kelas X di SMAN 1 Kadugede. Berdasarkan hasil validasi ahli materi, ahli media, dan ahli pendidikan bahan ajar E-LKPD berbasis proyek terintegrasi STEM dinyatakan sangat valid untuk digunakan dalam pembelajaran. Berdasarkan angket respon guru dan siswa diperoleh respon sangat efektif dengan persentase rata-rata 94,04% dan 81.02%. Hasil pembelajaran siswa dengan menggunakan E-LKPD memperoleh nilai rata-rata 90 dengan kategori sangat baik. Dapat disimpulkan bahwa E-LKPD berbasis proyek terintegrasi STEM layak dan efektif digunakan dalam pembelajaran berbasis proyek terintegrasi STEM.
Kata Kunci : E-LKPD, pembelajaran berbasis proyek, perubahan lingkungan, STEM

To instill 21st century skills in students, apart from using approaches and models in learning, they must be equipped with appropriate and effective teaching materials accompanied by the use of technology so that learning goals are more easily achieved. Based on the results of the analysis, a problem was found that the school had implemented simple project-based learning using LKPD teaching materials, but the LKPD used had not facilitated students in creating projects which only contained general questions. This causes the teaching materials used to be not specific to facilitate students in creating projects. The aim of this research is to develop an integrated STEM project-based E-LKPD on environmental change material. This research is Research & Development (R&D) research with the ADDIE development model which consists of analysis, design, development, implementation, evaluation stages. The instruments used in this research were needs analysis sheets, validation sheets from material experts, media experts, education experts, and teacher and student response questionnaires. The trial phase was carried out on 36 class X students at SMAN 1 Kadugede. Based on the validation results of material experts, media experts, and education experts, STEM integrated project-based E-LKPD teaching materials were declared very valid for use in learning. Based on the teacher and student response questionnaire, very effective responses were obtained with an average percentage of 94.04% and 81.02%. Student learning outcomes using E- LKPD obtained an average score of 90 in the very good category. It can be concluded that the STEM integrated project-based E-LKPD is feasible and effective for use in STEM integrated project-based learning.
Keywords: E-LKPD, project-based learning, environmental change, STEM