This study aimed to produce a valid and reliable assessment tool for junior high school students' integrated science learning and determine their improvement of science process skills (SPS) using the integrated science instruction. The research procedure consisted of ten stages, i.e., preliminary study, planning, development of draft assessment…

This research aims to produce an assessment instrument of STEM-based critical thinking skill which meets the feasibility criteria. This development research refers to the model developed by Borg & Gall and is modified using the development model instruments developed by Oriondo & Antonio. The research subjects were one senior high school…