PENGEMBANGAN PENUNTUN PRAKTIKUM BERBASIS LINGKUNGAN PADA MATERI REAKSI EKSOTERM DAN ENDOTERM UNTUK KELAS XI MIPA SMAN 8 BENGKULU UTARA

[The development of environmental based-labwork instruction book on the topic of exotherm and endotherm reaction for student of Class XI of Science, SMAN 8 Bengkulu Utara]The type of this research is a Research and Development study developing an environmental based - labwork instruction book on exothermic and endothermic reaction topic with the aim of knowing the feasibility and response of students to the labwork instruction book and to determine the psychomotor (skills) score ​​of students using it. This research uses the ADDIE development model (Analysis, Design, Development and Evaluation). This research was conducted at SMAN 8 Bengkulu Utara with research subjects namely 9 students in class XI MIPA 3 for small-scale trials and 28 students in class XI MIPA 1 for large-scale trials. Based on the research results, it is found that (1) The developed environment-based labwork instruction book was suitable to be applied with the percentage of material and media validity respectively were 92.5% and 93.3% with very valid criteria (2) Student responses to the labwork instruction guidebook fell in the very good criteria from the aspects of content quality, language and usefulness with an average percentage was 92.2% on a small scale and 92.7% on a large scale. (3) The psychomotor assessment of students using the labwork instruction book fell in a good criteria, 71.0% for the assessment aspect of the preparation stage; 74.8% for assessment of the implementation stage and 84.7% for assessment of the final stage, with an average percentage of 76.8%.