Development of Problem-Based Learning (PBL) Instrument to Improve Mathematical Communication

Abstract

The purpose of the research is to develop students' worksheet with valid, practical, and effective PBL-based for the second semester of VIII grade students of SMP / MTs to improve mathematical communication. This research was conducted in class VIII of MTsN 7 Tanah Datar. This research was using Plomp model development, which consists of three phases, namely preliminary research, prototyping, and assessment. The instruments used in this research were LKPD validation sheets, questionnaires, interview guidelines, and tests. Before using the tool to collect data, the tool has been validated by the validator. The results showed that the designed LKPD is valid, practical, and effective.