<![CDATA[The application of the constructivist approach in the implementation of mathematics subjects at SDN 013 Long Kali still faces obstacles. The problem occurs because teachers do not understand how to plan constructivist learning approaches. The purpose of the study was to determine the application of the constructivist approach after teachers held focus group discussions with researchers and together with researchers planned learning devices with a constructivist approach. The research method is qualitative research with respondents teachers, students and principals. Determination of respondents, namely purposive sampling, is based on research objectives. Snowball sampling occurs through the involvement of participants according to respondents. The research procedure begins with researchers compiling instruments and learning devices with a constructivist approach, implementing research through interview and observation techniques. Data analysis through coding, data reduction, data display, temporary conclusions and final conclusions that occur during the interview process. The results of the study were obtained from teacher respondents who had prepared, implemented and evaluated the application of the constructivist approach. Student respondents have prepared, implemented, and produced performance in the form of a simple LKPD project related to spatial geometry mathematics, and the principal respondents have facilitated the preparation, implementation, and evaluation of the implementation of learning with a constructivist approach so that students produce simple project performance in the form of LKPD related to spatial geometry.]]>
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