Pemecahan Masalah Usaha Dan Energi Dengan Model Pembelajaran Berbasis Proyek Ditinjau Dari Keterampilan Berpikir Kritis Peserta Didik

The research have three aimed that include : (1) examine the effect of guided project based learning toward problem solving, (2) examine the effect of guided critical thinking ability toward problem solving, and (3) examine the interaction between  project based leraning and critical thinking ability toward problem solving. This research is quasi experiment with factorial 2×2 design. The population is all of class XI MIPA in SMAN 1 Narmada. The sampling tehnique is cluster random sampling which XI MIPA 3 as experiment group with project based learning model and XI MPA 2 as control group with convensional model. Tehnique of collecting data of problem solving using essay test 7 question and collecting data of critical thinking ability using essay test 5 question. Data of research is normal and homogen that showed by  , χ2quantification≤ χ2tabel  = 9,17  which  H0AB accepted dan H1AB rejected, that showed there is not interaction between project based  learning and critical thinking ability toward problem solving.