Penelitian ini bertujuan untuk menghasilkan Booklet Ikan Tempakul (Mudskipper) berbasis potensi lokal pesisir pantai Pulau Sebatik pada sub materi vertebrata untuk siswa kelas X Madrasah Aliyah Negeri Tarakan yang berkualitas dan untuk mengetahui respon siswa kelas X Madrasah Aliyah Negeri Tarakan terhadap Booklet Ikan Tempakul (Mudskipper) berbasis potensi lokal pesisir pantai Pulau Sebatik pada sub materi vertebrata. Jenis penelitian ini adalah penelitian dan pengembangan (Reseach and Develoment) dengan menggunakan model 4-D (Define, Design, Develop and Disseminate). Subjek uji coba dalam penelitian ini yaitu siswa kelas X Madrasah Aliyah Negeri Tarakan yang berjumlah 12 Siswa. Keseluruhan data diperoleh berdasarkan skor dari angket penilaian ahli media, ahli materi, praktisi dan angket respon siswa. Hasil penelitian menunjukkan bahwa kualitas Booklet Ikan Tempakul (Mudskipper) berbasis potensi lokal pesisir pantai Pulau Sebatik pada sub materi vertebrata berdasarkan penilaian ahli media memperoleh hasil rata-rata skor sebesar 88% dengan kriteria sangat layak, penilaian ahli materi memperoleh hasil rata-rata skor sebesar 84% dengan kriteria sangat layak, penilaian praktisi memperoleh hasil rata-rata skor sebesar 83% dengan kriteria sangat layak dan respon siswa berdasarkan hasil uji coba menunjukkan rata-rata skor sebesar 96% dengan kriteria sangat baik.

This research aimed to produce a quality Mudskipper Fish Booklet based on the local potentials of coastal areas along Sebatik Island in vertebrate sub-materials for Grade X of MAN Tarakan students and to figure out the responses of Grade X students at MAN Tarakan to the Mudskipper Fish Booklet based on the local potentials of coastal areas along Sebatik Island on vertebrate sub-materials. The study was classified into R&D (Research and Development) type using the 4-D model (Define, Design, Develop, and Disseminate) The research subjects were 12 Grade X students of MAN Tarakan The data were obtained from the scores given by the media expert, material expert, practitioner and student responses to the distributed questionnaires. The results show that the quality of Mudskipper Fish Booklet based on the local potentials of coastal areas along Sebatik Islas on vertebrate sub-materials after respectively assessed by the media expert was at the average score of 83% in highly feasible criteria, by material expert at the average score of 84% in highly feasible criteria, by practitioner at the average score of 83% in highly feasible enteria, and by student responses at the average score of 96% in excellent criteria