Practicum is an important component of Biology learning that plays a role in developing students' science process skills, conceptual understanding, and scientific attitudes. Therefore, prospective Biology teacher students need to be equipped with the ability to develop practicum-based learning. This study aims to analyze the skills of prospective Biology teacher students in developing Biology learning using the practicum method. This study used a descriptive approach, involving 30 students enrolled in the School Biology Practicum Development (PPBS) course in the 2024/2025 academic year. Data were obtained through an assessment of student portfolio documents, including practicum designs, teaching modules, practicum teaching materials, and practicum assessment instruments. Data were analyzed using descriptive percentage techniques. The results showed that the skills of prospective Biology teacher students in developing practicum-based learning were in the good category with an average achievement of 74.90%. In detail, the skills of compiling practicum designs were in the very good category (76.83%), while the skills of compiling teaching modules (75.00%), practicum teaching materials (74.50%), and practicum assessment instruments (73.50%) were in the good category. These results indicate that students have sufficient basic competencies for developing practicum-based learning, but strengthening is still needed in high-level thinking skills, the quality of teaching materials, and authentic assessment. ABSTRAK Praktikum merupakan komponen penting dalam pembelajaran Biologi yang berperan dalam mengembangkan keterampilan proses sains, pemahaman konseptual, serta sikap ilmiah peserta didik. Oleh karena itu, mahasiswa calon guru Biologi perlu dibekali kemampuan dalam mengembangkan pembelajaran berbasis praktikum. Penelitian ini bertujuan untuk menganalisis keterampilan mahasiswa calon guru Biologi dalam mengembangkan pembelajaran Biologi dengan metode praktikum. Penelitian ini menggunakan pendekatan deskriptif dengan subjek sebanyak 30 mahasiswa yang menempuh mata kuliah Pengembangan Praktikum Biologi Sekolah (PPBS) pada tahun ajaran 2024/2025. Data diperoleh melalui penilaian terhadap dokumen portofolio mahasiswa yang meliputi rancangan praktikum, modul ajar, bahan ajar praktikum, dan instrumen penilaian praktikum. Data dianalisis menggunakan teknik deskriptif persentase. Hasil penelitian menunjukkan bahwa keterampilan mahasiswa calon guru Biologi dalam mengembangkan pembelajaran berbasis praktikum berada pada kategori baik dengan rata-rata capaian sebesar 74,90%. Secara rinci, keterampilan menyusun rancangan praktikum berada pada kategori sangat baik (76,83%), sedangkan keterampilan menyusun modul ajar (75,00%), bahan ajar praktikum (74,50%), dan instrumen penilaian praktikum (73,50%) berada pada kategori baik. Hasil ini menunjukkan bahwa mahasiswa telah memiliki kompetensi dasar yang cukup dalam mengembangkan pembelajaran berbasis praktikum, namun masih diperlukan penguatan pada aspek pengembangan keterampilan berpikir tingkat tinggi, kualitas bahan ajar, dan penilaian autentik.
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