Intan Kurniati^1,, Izwita Dewi¹, Hasratuddin¹

Problem solving ability is an ability that sudent have to achieve after learning mathematics. This ability can be trained through using appropriate problems on student worksheets. The purpose of this study was to produce effective worksheet based on PISA and be able to improve students' problem solving abilities. The type of research is the research development that use Dick & Carey models. The trials in this study were carried out in the X IA 3 and X IA 5 classes of Brigjend Katamso I Medan. From the results of trial I and trial II obtained: (1) Worksheet based on PISA that was developed effectively, in terms of: a) classical learning completeness of students that is 89,74%; b) learning objectives for each item is more than 75%; c) 91,79% of students give positive responses; and d) learning time is the same as regular learning time; and (2) there is an increase in the average problem solving ability of students in the first tryout of 0,3 with a low category and in the second trial of 0,4 in the medium category.

mathematical problem solving skills, PISA, student worksheets