Abstract :
The purpose of this research to describe the development of Monomath media in improving mathematical creative thinking skills two-dimentional figure. this type of research is types of research RnD (research and development) by using 10 steps were adapted by researchers from Borg and Gall. Data collection techniques using a validation questionnaire and tests. the results of media monomath validation is quality of content and purpose get the total 46,75 with a very good category, instructional quality get the total score 46,75 with a very good category. response limited-scale students to Monomath media obtained a score of 89% in the category of strongly agree and the response of large-scale students to Monomath obtained score of 89% in the category of strongly agree. on the results of the analysis of mathematical creative thinking abilities using formulas Gain Score. limited scale trials get average scores 0.93 improvement criteria included in high category and large-scale trials obtain average scores 0.76 improvement criteria included in the high category.