<![CDATA[This study aims are to find out the types of students’ misconceptions on the topic of reaction rate, to know the effectiveness of a remedy in Learning Cycle 5E (LC 5E) models with cognitive conflict strategies and to know the retention of students' understanding, 3 weeks after the remedy. The research subjects were 31 students of XI IPA in a high school situated in Batu. The research instruments in the form of three-tier multiple choices diagnostic test consisting of 21 questions with a content validity of 98.04% and a reliability of 0.866 and a set of a remedy learning. The results showed that 14 types of misconceptions were found on an average of 23.75% research subjects. The remedy learning in LC 5E with cognitive conflict strategies was able to reduce the students’ misconceptions to an average of 9.68% only, and 3 weeks after the remedy, the retention of students’ understanding was still 91.44% with excellent criteria.]]>
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