Penelitian ini bertujuan mendeskripsikan dan menjelaskan:(1) perbedaan  keterampilan berpikir kritis dan prestasi belajar antara kelompok siswa yang belajar dengan model pembelajaran berbasis proyek dan model pembelajaran langsung, (2) perbedaan ketrampilan berpikir kritis antara kelompok siswa yang belajar dengan model pembelajaran berbasis proyek dan model pembelajaran langsung, (3) perbedaan prestasi belajar antara kelompok siswa yang belajar dengan model pembelajaran berbasis proyek dan model pembelajaran langsung. Penelitian ini menggunakan rancangan post-test only control group design. Data dikumpulkan dengan tes keterampilan berpikir kritis dan tes prestasi belajar. Data yang diperoleh dianalisis secara statistik deskriptif dan MANOVA satu jalur. Hasil penelitian menunjukkan bahwa: (1) terdapat perbedaan ketrampilan berpikir kritis dan prestasi belajar, antara kelompok siswa yang belajar dengan model pembelajaran berbasis proyek dan model pembelajaran langsun (F=59,161; p<0,05),(2) terdapat perbedaan ketrampilan berpikir kritis antara kelompok siswa yang belajar dengan model pembelajaran berbasis proyek dan model pembelajaran langsung (F=15,100; p<0,05), (3) terdapat perbedaan prestasi belajar antara kelompok siswa yang belajar dengan model pembelajaran berbasis proyek dan model pembelajaran langsung (F= 67,849; p<0,05). Kata-kata Kunci: pembelajaran berbasis proyek, keterampilan berpikir kritis, dan prestasi belajar AbstractThis study aims to describe and explain: (1) differences in critical thinking skills and learning achievement between groups of students who study with project-based learning model and direct instructional model, (2) differences in critical thinking skills among the groups of students who study with the project-based learning model and direct learning model, (3) the differences of learning achievement between groups of students learning with project-based learning model and learning model directly. This study was design post-test only control group design. Data were collected by critical thinking skills and learning achievement test. Data were analyzed by descriptive statistics and one way MANOVA. The results showed that: (1) there were differences in critical thinking skills and learning achievement between groups of students who study with project-based learning model and direct instructional model (F = 59,161; p<0,05), (2) there were differences in thinking skills critical among groups of students who are learning to project-based learning model and direct instructional model (F=15,100; p<0.05), (3) there were differences in learning achievement between groups of students learning with project-based learning model and direct instructional model (F=67,849; p <0.05). Keywords: project-based learning model, critical thinking skills, and learning achievement