摘要：This study aims to: 1) Determine the spatial ability test results of students in problem-based learning models 2) determine the trajectory thinking SMA Negeri 1 Panyabungan East in solving spatial problems on a model of problem-based learning. Subjects in this study is a class XII MIA SMA Negeri 1 East Panyabungan as many as 30 people. This research was qualitative descriptive. The research instrument is a test of spatial ability and interview guidelines. Subject to interview selected as many as 6 people based on the mathematical level of spatial ability. The results showed that: 1) The level of spatial ability in high-ability students have the highest proportion as many as 10 students, followed by the ability students were 14 students and their poor performance as much as 6 students. So, the percentage level of spatial ability students with the ability to 'high' as much as 33.3%; the ability to 'moderate' as much as 46.6%; and the ability to 'low' as much as 20%. 2) Stages of the thought process that is owned by the learners as well as results and findings of this research were the visualization, analysis, informal deduction, deduction and rigor that will be passed as a track point thinking of students.
关键词：spatial capabilities; problem based learning; students' thinking path
