Development of ACERA Learning Model Based on Proof Construction Analysis

Proof constructing is the process of justifying a claim using methods and concepts proof to produce mathematical proof. also an aspect proof, often only way assess student performance. However, construction still constant problem (difficulty) for every student. The cause this difficulty not because content in textbooks/sources, over-reliance on examples, understanding, underlying logic, ability use writing strategies, but due lack discussion activities that train students understand answer practice questions, give reasoning against has been constructed, validating own other colleagues' answers. Thus, study aims develop valid practical ACERA (Activities, Classroom Discussion, Exercises, Reason, Audience) learning model potential effect students' construction. This uses research design development three stages, namely preliminary stage, stage assessment stage. subjects were 23 Mathematics Education program at University Mataram. offers alternative solution reduce construction, thus enabling have characteristics are valid, increasing productivity