H.T.N. Rizki, D. Frentika, A. Wijaya
This study aims to explore junior high school students' adaptive reasoning and the Van Hiele level of geometric thinking. The present study was a quasi-experiment with the non-equivalent control group design. The participants of the study were 34 seventh graders and 35 eighth graders in the experiment classes and 34 seventh graders and 34 eighth graders in the control classes. The students in the experiment classes learned geometry under the circumstances of a Knisley mathematical learning. The data were analyzed quantitatively by using inferential statistics. The results of data analysis show an improvement of adaptive reasoning skills both in the grade seven and grade eight. An improvement was also found for the Van Hiele level of geometric thinking. These results indicate the positive impact of Knisley learning model on students' adaptive reasoning skills and Van Hiele level of geometric thinking. © Published under licence by IOP Publishing Ltd.
Mathematics Education Department, Universitas Negeri Yogyakarta, Indonesia
