Penelitian ini bertujuan untuk menganalisis studi struktur komunitas bivalvia berdasarkan indeks keanekaragaman, kepadatan, dan dominansi kelas bivalvia di pesisir pantai Amal Lama, Pulau Tarakan dan pesisir pantai Tambak, Pulau Bunyu menjadi booklet yang layak dan berkualitas bagi siswa SMA. Kelayakan dan kualitas diperoleh dari hasil penilaian validasi ahli materi, validasi ahli media, validasi praktisi, dan respon siswa. Penelitian yang digunakan adalah penelitian dan pengembangan (Research And Development) yang mengacu pada model yang di kemukakan Borg and Gall (1983). Hasil penelitian menunjukkan Tingkat indeks keanekaragaman di pesisir pantai Amal Lama, Pulau Tarakan dan pesisir pantai Tambak, Pulau Bunyu sangat rendah kurang 3,32. Indeks kepadatan di pesisir pantai Amal Lama, Pulau Tarakan dan pesisir pantai Tambak, Pulau Bunyu sangat rendah kurang 0,35. Indeks dominansi di pesisir pantai Amal Lama, Pulau Tarakan rendah kurang 0,50
sedangkan untuk Indeks dominansi di pesisir pantai Tambak, Pulau Bunyu terdapat spesies yang mendominasi dengan nilai lebih dari 0,50. Selanjutnya dilakukan pengembangan terhadap hasil penelitian berupa booklet. Hasil pengembangan booklet memiliki hasil validasi ahli materi sebesar 94 % dengan kategori sangat layak, ahli media sebesar 86 % dengan kategori sangat layak, validasi praktisi guru biologi sebesar 90 % dengan kategori sangat layak dan hasil angket respon siswa sebesar 85 % dengan kategori sangat menarik, Sehingga dapat disimpulkan bahwa booklet yang dikembangkan dan layak digunakan.

This research aims to analyze the study of bivalve community structures based on diversity, density, and class dominance of bivalves at Amal Lama coast, Tarakan Island and coast of Tambak beach, Bunyu Island become suitable booklet and qualivied booklet for students of senior high school. Feasibility are obtained from the results of material assessment from expert validation, media expert validation, practitioner validation, and student response. The research used research and development (Research And Development) which refers to the model proposed by Borg and Gall (1983). The results showed the diversity index level at Amal Lama coastline, Tarakan Island and Tambak coastline, Bunyu Island is very low at less than 3.32. Density index at Amal Lama coast, Tarakan Island and Tambak coastline, Bunyu Island is very low at less than 0.35. The dominance index at Amal Lama coast, Tarakan Island is low at less than 0.50 while for the Dominance Index at the Tambak coastal, Bunyu Island there are dominating species with the value more than 0.50. Then the development is done a toward the research results in form of booklets. The results of booklets development have the results of material expert validation of 94% with very feasible categories, media experts at 86% with very feasible categories, validation of biology teacher practitioners at 90% with very feasible categories and student response questionnaire results at 85% with very interesting categories, So it can be concluded that the booklet was developed and is suitable for using.