Mathematical reasoning abilities and learning activities of MAN 2 Kota Padang students are still low. Several aspects are believed to be the cause of the low reasoning ability. one of which is the monotonous learning model. The purpose of this study was to improve the activity and mathematical reasoning abilities of class X students through a problem-based learning model using the Cla... https://www.inksstops.shop/product-category/tatsoul-arm-rest/