Implementation of E-Module Buffer Solution To Improve Students' Critical Thinking Skills

This study aims to describe student activities, analyze improvement in students 'critical thinking skills, and analyze students' responses to learning using the buffer e-module solution. The method used was a one group pretest posttest with research subjects in class XI IPA 3 SMA Jaya Suti Abadi. The percentage of student activities in implementing this e-module is 93% with a very good category. Students' critical thinking skills have improved with an average value of n-gain of 0.59 in the medium category. The response of students who answered agreed to achieve 54% results, which means students like to learn with e-modules and e-modules get positive responses. The results of this study indicate that learning by applying a buffer solution e-module can be used as an alternative to improving students' critical thinking skills.