Penelitian ini memiliki tujuan untuk menganalisis (1) kelayakan Lembar Kegiatan Peserta Didik berbasis Problem Based Learning untuk meningkatkan berpikir kritis, (2) Respon peserta didik terhadap Lembar Kegiatan Peserta Didik (LKPD) berbasis problem based learning untuk meningkatkan bepikir kritis peserta didik, (3) efektifitas Lembar Kegiatan Peserta Didik (LKPD) berbasis problem based learning sebagai bahan ajar yang dikembangkan.

 Penelitian ini merupakan penelitian pengembangan yang menggunakan media pembelajaran Lembar Kegiatan Peserta Didik. Jenis pengembangan  yang digunakan pada penelitian ini yaitu penelitian dan pengembangan atau Research and Development (R&D) dengan model pengembangan 4-D Thiagarajan, Sammel dan Sammel yang terdiri dari define, desain, development, dan dissemination. Pengumpulan data diperoleh dari hasil validasi kelayakan bahan ajar serta materi, hasil dari pretest dan posttest, dan hasil respon peserta didik terhadap penerapan bahan ajar.

Penelitian ini menunjukkan bahwa hasil validasi kelayakan materi memperoleh rata-rata presentase sebesar 81%, untuk hasil validasi kelayakan kegrafikan memperoleh rata-rata presentase sebesar 100%, hasil validasi kelayakan Bahasa pada seluruh aspek memperoleh rata-rata prosentase sebesar 91%, sedangkan hasil validasi evaluasi memperoleh rata-rata prosentase sebesar 76%. Berdasarkan angket respon siswa yang sudah diberikan menunjukkan presentase sebesar 81%. Untuk hasil pretest dan posttest siswa terhadap lembar kegiatan peserta didik mencapai ketuntasan dari 6% naik menjadi 76% dengan hasil N-Gain sebesar 0,7 berkategori sedang. Hal tersebut menunjukkan bahwa pengembangan Lembar Kegiatan Peserta Didik berbasis Problem Based Learning pada Kompetensi Dasar Perdagangan Internasional dapat meningkatkan berpikir kritis dan layak digunakan.

Kata kunci: Lembar Kegiatan Peserta Didik, Problem Based Learning, dan Berpikir Kritis

This study aimed to analyze (1) the feasibility of the PBL student activity sheet to improve critical thinking, (2) the response of the student to the PBL student activity sheet to improve students’ critical thinking, (3) the effectiveness of PBL student activity sheet as a developed teaching material.

This research is a development research using learning media for student activity sheets. The type of development used in this research is Research and Development (R&D) using Thiagarajan, Sammmel and Sammel 4-D development models consisting of define, design, development, and dissemination. Data were obtained from the validation results of the feasibility of teaching materials and the materials, the results of the pretest and posttest, and the results of students’ responses towards the application of teaching materials.

This study showed that the results of the validity of the material obtained an average percentage of 81%, the results of the validation of the feasibility of the graphic obtained an average percentage of 100%, the results of language validation in all aspects obtained an average percentage of 91%, while the results of validation the evaluation obtained an average percentage of 76%. Based on the questionnaire responses, the response of the students showed a percentage of 81%. For the pretest and posttest results of students on the student activity sheet reached completeness from initially 6% to 76% with the result of N-Gain is 0,7 which is included moderate category. This study showed that the development of the PBL student activity sheet on basic competency of international can improve critical thinking and feasible to use.

 Keywords: Student Activity Sheet, Problem Based Learning, and Critical Thinking