PENGEMBANGAN PERANGKAT PEMBELAJARAN IPA MODEL PROBLEM BASED LEARNING (PBL) BERBASIS SOCIO-SCIENTIFIC ISSUE (SSI) UNTUK MENINGKATKAN KETERAMPILAN BERPIKIR KRITIS SISWA SMP 

Development Learning Material of Problem Based Learning (PBL) Based Socioscientific Issue (SSI) to Improve Critical Thinking Skills Junior High School. 

Penelitian ini bertujuan untuk menghasilkan perangkat pembelajaran IPA model   Problem Based Learning (PBL) Berbasis Socioscientific Issue (SSI) untuk Meningkatkan Keterampilan Berpikir Kritis Siswa SMP yang layak ditinjau berdasarkan validitas, kepraktisan dan keefektifan.  Penelitian ini menggunakan model pengembangan 4-D dan desain uji coba pre-test post-test design. Penelitian ini diujicobakan kepada dua sekolah dengan tiap sekolah berjumlah tiga kelas. Metode penelitian yang digunakan antara lain metode validasi, pengamatan, angket dan tes. Instrumen yang digunakan dalam penelitian adalah lembar validasi, keterlaksanaan pembelajaran, aktivitas siswa, respon siswa dan tes keterampilan berpikir ktitis. Analisis data menggunakan percentage of agreement, N-gain, uji t paired dan uji t independent. Data hasil penelitian diperoleh sebagai berikut: 1) Validitas perangkat pembelajaran berkategori valid dan sangat valid 2) Kepraktisan ditinjau berdasarkan keterlaksanaan pembelajaran memiliki kategori sangat baik pada semua kelas di kedua sekolah dan aktivitas siswa semua kelas  berkategori sangat baik, 3) keefektifan ditinjau berdasarkan tes keterampilan berpikir kritis mengalami peningkatan N-gain dengan kategori tinggi, ada peningkatan keterampilan berpikir kritis secara signifikan pada alfa 5%   dengan rerata level peningkatan tidak berbeda pada ketiga kelas pada masing-masing sekolah dan  respons yang diberikan siswa berkategori sangat baik. Berdasarkan hasil penelitian di atas, dapat disimpulkan bahwa perangkat pembelajaran yang dikembangkan layak digunakan untuk meningkatkan keterampilan berpikir kritis siswa.

This study aimed  to produce a proper learning materials a using Problem Based Learning (PBL) model Based on Socioscientific Issue (SSI) to improve Critical Thinking Skills Junior High School Students, that was reviewed based on validity, practicality and effectiveness. This study used a 4-D development model and used pre-test post-test design. This research was tested on two schools with three classes in each school in class VII. The research methods used include validation methods, observation, questionnaires and tests. The instruments used in the research were validation sheets, implementation of learning, student activities, student responses and tests of critical thinking skills. Data analysis used percentage agreement, N-gain, paired-t test and independent t test.The result of this research as follows:1) The validity of the learning materials developed  is in the valid and very valid categores, 2) The practicality is reviewed based on the implementation of the learning has a very good category in all classes in both schools and student activities in all classes are in a very good category. 3) the effectiveness in terms of the critical thinking skills test the category N-gain is  high, pre-posttest significant different after learning with PBL model based SSI and there is no difference in the three classes in each school and the responses given by the students are categorized as very good. Based on the research results above, it can be concluded that the development learning material are feasible to improve students' critical thinking skills.