development of learning tools through the wankat-oreovocz strategy to improve mathematical problem solving ability of junior high school students

this study aims to produce quality teaching materials developed based on the wankat-oreovocz strategy and to analyze the improvement of students mathematical problem solving abilities who are taught using the wankat-oreovocz strategy. this research is a development research using the thiagarajan 4-d development model (define, design, develop, dessiminate). the learning tools developed were student books, student worksheets and tests of mathematical problem solving abilities. the trial of learning tools based on the wankat-oreovocz strategy was carried out three times to obtain a quality device. based on the results of the analysis, the learning device using the wankat-oreovocz strategy has good quality at the disseminate stage and the ability to solve mathematical problems learned using the wankat-oreovocz strategy increases at the disseminate stage. the results of data analysis indicate that the wankat-oreovocz strategy learning tool can improve students mathematical problem solving abilities.