This research aims to find out the influence used Problem Based Learning model assisted by Question Card toward students mathematic critical thinking skill in junior high school. This research was quantitative by using Quasi Experimental with the nonequivalent posttest-only control group design. The technique was purposive sampling method. The instrument of this method was six items, then validity test, reliability test, level of difficulty, and discrimination power. Normality and homogeneity test were used as requirement test and got the data was normal distribution and the two-group homogenous. The hypothesis test used t-test got the result 2,970 made Ho rejected with 5% significance level with effect size was 0,656 or 66% that moderate classified. Based on the result of this research, it can be concluded that there is an influence of problem-based learning model assisted by question card toward mathematic critical thinking skill with moderate criteria.

Saat ini hasil belajar anak belum bisa dikatakan berhasil secara optimal dimana bagi anak slow learner, pembelajaran daring bukanlah solusi yang baik. hal ini didukung oleh tidak semua orang tua dan guru berperan secara optimal. Masalah ini menjadi salah saru alasan penelitian yang bertujuan untuk mengkaji peran guru dan orang tua dalam mengatasi kesulitan belajar matematika anak slow learner di masa pandemi covid-19. Jenis penelitian yang digunakan oleh peneliti adalah kualitatif, dengan desain penelitian yang digunakan merupakan kualitatif deskriptif. Subjek penelitian digunakan peneliti ada 3 yaitu satu guru mata pelajaran .matematika, satu orangtua anak ABK, dan satu kepala sekolah. Metode pengambilan data dengan menggunakan metode wawancara dan observasi secara daring. Teknik analisis data yang digunakan adalah reduksi data, penyajian data, dan penarikan kesimpulan. Hasil penelitian ini menunjukan bahwa peran guru yakni adanya perlakuan khusus di kelas, guru selalu memantau tugas-tugas anak slow learner, dan adanya video pembelajaran matematika yang di kirimkan oleh guru via whatsapp.. Adapun peran orang tua yakni merupakan pendidik bagi anak, orangtua sebagai pelindung anak, anak prioritas orangtua, dan orangtua mengetahui kondisi anak ketika di rumah. Adapun peran kepala sekolah yakni kepala sekolah membimbing guru dalam proses pembelajaran, dan adanya evaluasi untuk guru. Kesimpulan dari penelitian ini bahwa guru, orangtua, dan kepala sekolah sangatlah berpengaruh dalam mengatasi kesulitan belajar anak slow learner.

Since Indonesian students’ critical thinking skills in junior high school is still in unexpected level, it should be improved through teaching and learning process. The objective of the study is finding out the influence of problem centered learning approach toward students’ mathematical critical thinking ability. Every student should have mathematical critical thinking skills to make mathematics lessons are easier. Using the critical thinking skills will help students improving problem solving skills. However, the current critical thinking ability of junior high school students is still low. This research used quasi experimental design with Static Group Comparation type. The research sample consisted of two classes with each class of 35 students. The research instrument consists of six questions which indicate a mathematical critical thinking ability. Data analysis of this study used the Mann-Whitney test. The results of the study indicate that there is an effect of the problem-centered learning approach on the students' mathematical critical thinking ability with testing criteria is high.

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