Belum tersedianya bahan ajar yang dapat melatihkan kemampuan berpikir kritis menyebabkan kemampuan berpikir kritis peserta didik masih tergolong rendah. Penelitian ini bertujuan menghasilkan bahan ajar materi Elastisitas dan Hukum Hooke melalui pengajaran inkuiri terbimbing yang layak digunakan untuk melatih kemampuan berpikir kritis peserta didik. Penelitian ini menggunakan model pengembangan ADDIE dengan 29 orang peserta didik kelas XI MIPA 2 SMAN 12 Banjarmasin sebagai subjek uji coba penelitian. Data diperoleh melalui wawancara, lembar validitas bahan ajar, lembar pengamatan RPP, lembar aktivitas peserta didik, dan tes hasil belajar yang mengacu pada indikator kemampuan berpikir kritis. Analisis data dilakukan secara deskriptif kualitatif dan kuantitatif. Hasil penelitian menunjukkan bahwa: (1) validitas bahan ajar berdasarkan komponen RPP, LKPD, materi ajar dan THB memperoleh skor 3,345 dengan berkategori valid; (2) kepraktisan bahan ajar berdasarkan keterlaksanaan RPP memperoleh skor 3,47 dengan berkategori sangat baik; dan (3) efektivitas bahan ajar berdasarkan nilai N-Gain memperoleh skor 0,30 dengan berkategori sedang, serta aktivitas peserta didik yang memperoleh skor 60,06 dengan berkategori baik. Dengan demikian, dapat disimpulkan bahwa bahan ajar materi Elastisitas dan Hukum Hooke melalui pengajaran inkuiri terbimbing layak digunakan untuk melatih kemampuan berpikir kritis dan dapat diimplementasikan dalam proses pembelajaran. The lack of teaching materials availability that can train critical thinking skills causes students' critical thinking skills in low category. This research aims to produce Elasticity and Hooke's Law teaching materials through guided inquiry teaching that is eligible for training students' critical thinking skills. This research used the ADDIE development model with 29 students from XI MIPA 2 class at SMAN 12 Banjarmasin as the research trial subjects. The data were obtained through interview, teaching materials validity sheet, lesson plan observation sheets, student activity sheets, and learning outcomes tests that refer to critical thinking skills indicators. Data analysis was carried out by descriptive qualitative and quantitative. The results showed that: (1) the teaching materials validity based on the components of lesson plam, worksheet, teaching materials and learning outcome test obtained 3,345 in valid category; (2) the teaching materials practicality based on lesson plan implementation obtained 3.47 in very good category; and (3) the teaching materials effectiveness based on the N-Gain value obtained 0.30 in medium category, and students’ activity that obtained 60.06 in good category. Thus, it can be concluded that Elasticity and Hooke's Law teaching materials through guided inquiry teaching are eligible to be used to train critical thinking skills and can be implemented in the learning process.