Development Of Mathematical Learning Devices Based On Inquiry To Improve Mathematical Problem-Solving Skills Of Tenth Grade Students In Vocational School

摘要

This development research aims to provide an inquiry-based mathematics learning tool for tenth-grade students of Vocational School that are valid, effective and practical in order to develop their mathematical problem-solving abilities. This research is motivated by the learning of mathematics in schools, especially in vocational high schools (SMK) that have not supported the development of problem-solving skills. The priliminary results of interviews and observations were taken in SMAKPA, West Sumatra. The resealed that teachers merely depended on questions in textbooks although a few of them gave questions in an effort to train mathematical problem-solving skills. The existing student worksheets (LKPD) were not prepared by the teacher itself but were purchased from the publisher and even did not use LKPD. The form of RPP and LKPD are used as tools developed in this study. Three stages of the development model of Plomp are applied. The research data was collected by interviews, questionnaires, observation sheets, and analysis sheets as well as tests of mathematical problem-solving abilities. Therefore, The results of the study showed that the mathematics learning tools produced meet valid, practical and effective categories both in terms of feasibility and validity. In other words, the developed device can be used as reference material in mathematics learning that is oriented to problem-solving skills in tenth-grade students in SMKPA.