The Effect of The Tangram Media Assited STAD Model on The Understanding Of Mathematics Concepts Of Flat Building Materials

Abstract

This study aims to determine the effect of the STAD model assisted by tangram media on
the understanding of mathematical concepts in fourth grade students of SD

Muhammadiyah Integratif Dukun, Magelang Regency.This research is a type of pre-
experimental research with one group pretest-posttest design. The research was selected

by saturated sampling. The samples taken were 19 students. The method of data collection
is done by using a description test. The validity test uses the product moment formula,
while the reliability test uses the Cronbach alpha formula which produces a reliability
index of 0.924. Data analysis used parametric statistical techniques, namely the Paired
Sample T-Test with the help of the SPSS for Windows version 25.00 program.The results
of the analysis of the Data Test of Two Dependent Samples which were carried out using
the Paired Sample T-Test with the t count > t table, namely 18.323 > 2.093 with the Asymp
value. Sig. (2-tailed) 0.000 < 0.05. Based on the results of the analysis and discussion, there
is a difference in the average score of the mathematical concept understanding test, namely
the pretest average of 50.46, while the posttest average is 80.02. This shows that there is
an effect of the STAD model assisted by tangram media on the understanding of the
mathematical concept of flat shape material in fourth grade students of SD
Muhammadiyah Integratif Dukun, Magelang Regency, Academic Year 2020/2021.