Abstract: This study aims to improve students critical thinking skills in fifth grade students through Edmodos Assisted Problem Based Learning model. The location of the study was at Lowokwaru Elementary School 2 Malang, with 34 subjects in the fifth grade-A. This study used Quasi Experiment with the design of one group pretest posttest design. This study was conducted in 2 meetings, by doing several stages, namely, developing a Learning Implementation Plan (RPP), Student Worksheet (LKS), and Critical Thinking Skills Test. Data collection techniques use the method of observation of teacher activities and student activities, tests, and student response questionnaires.