The purpose of this study is as an initial step to introduce Hermetia illucens as one of the best ways to decompose organic waste in secondary schools as well as to see how students think about strategies in carrying out a waste recycling project. To accumulate and to analyse the data sincerely and comprehensively, researchers used a method of ADDIE method which has extensive steps: analysing, designing, developing, implementing, and evaluating. The participants which involve in this study is 44 senior high school students in one of secondary school in Bandung. The participants will receive learning in the implementation phase and work on metacognitive questions as part of the evaluation conducted. The data was taken to carry out certain students’ strategies to solve the problem of waste decomposition. Based on data analysis, there is already the ability of students to carry out certain strategies in conducting waste decomposition in secondary schools. In addition, the effect size that gained by the student through this study is 1.33 which is categorised as very strong.

Abstrak: Kemampuan metakognitif dinilai berpengaruh terhadap bagaimana peserta didik dapat belajar secara mandiri untuk memperoleh prestasi akademik. Untuk itu, penelitian ini bertujuan untuk mengukur bagaimana pembelajaran berbasis proyek dapat meningkatkan kemampuan metakognitif peserta didik dan mengidentifikasi kesadaran metakognitif peserta didik dalam pembelajaran. Data dalam penelitian ini dikumpulkan melalui pretest, posttest, observasi, dan angket kesadaran metakognitif. Data-data tersebut dianalisis secara kuantitatif dan kualitatif untuk menghasilkan pemahaman yang lebih baik tentang masalah dan hasil penelitian. Hasilnya, kemampuan peserta didik dalam memecahkan masalah metakognitif mengalami peningkatan. Indeks Gain yang diperoleh dari rata-rata hasil belajar peserta didik adalah 0.7, yang berarti memiliki signifikansi peningkatan yang tinggi. Dijelaskan pula bahwa kemampuan metakognitif mereka berkembang dilihat dari perubahan kategori kemampuan mereka yang diobservasi selama pelaksanaan proyek. Kesadaran metakognitif peserta didik setelah pembelajaran berbasis proyek mulai tampak pada beberapa aspek, di antaranya strategi pencarian dan perencanaan.Abstract: Metacognitive abilities can influence how students learn independently to achieve academic success. For this reason, the study aimed to examine how project-based learning can enhance students’ metacognitive abilities and identify students’ metacognitive awareness. To understand those goals, three steps of data collection were done, including pre-test, post-test, observation, and questionnaires. Both quantitative and qualitative approaches were conducted to better understand the problem and the results. As a result, the ability of students to solve metacognitive problems has improved. The Gain index from the student learning process is 0.7, means it has a significant increase. It was also explained that their metacognitive abilities had developed judging by the changes in their ability categories that were observed during project implementation. Several aspects, including search strategy and planning, were evident in students' metacognitive awareness after project-based learning.