DEFRAGMENTİNG STUDENTS' THİNKİNG STRUCTURE İN SOLVİNG MATHEMATİCAL ARGUMENTS

The structure of thinking is a representation the thought process in form problem-solving flow that carried out by person when he resolves problem. many students make mistakes solving problems. One way can be done to overcome these errors defragment thought. This study aims describe students’ erroneous mathematical argument and defragmenting efforts. 10th Grade high school Pasuruan, East Java, Indonesia, were involved as research subjects. They selected based on three criteria, namely low, moderate level procedural error. activity ‘think loud’ was used observe made argument. data obtained from this codified later basis perform process. Based findings study, it concluded are error determining value x an equation, modeling argument, proving valid Defragmenting using scaffolding approach improve students' problems