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ABSTRACT In mathematics learning many teachers complain about the students low ability to apply mathematical concepts. This can be seen from the many mistakes students make in understanding mathematical concepts so that they ignore mistakes in working on problems that can result in low student learning achievement (scores) both in daily tests, semester tests, and final school exams, even though in the classroom learning process is usually the teacher gives the task (stabilization) continuously in the form of problem training. The real conditions in the implementation of the exercises provided are not fully able to improve students abilities in applying mathematical concepts. The low quality of learning can be interpreted as being less effective in the learning process. The cause can come from students, teachers and facilities and infrastructure. Based on the problem, the researchers tried to find a solution by examining the Improvement of Mathematics Learning Achievement with the Problem-Based Learning Method in the Linear Program Discussion. The problems that the researcher revealed were: 1) Can the Problem-Based Learning method improve students ability to work on practice questions on the subject of Linear Program in class X-TKJ4 SMK 6 6 Garut academic year 2018/2019? 2) Can the Problem-Based Learning method improve student learning achievement on the subject of Linear Program in class X-TKJ4 SMK 6 6 Garut academic year 2018/2019? 3) How can the impact of the Problem-Based Learning method improve student learning achievement on the subject of Linear Program in class X-TKJ4 SMK 6 6 Garut academic year 2018/2019? The method used in this study is the test method, questionnaire, and observation with data analysis techniques, namely descriptive analysis. The results that the researchers got were: 1) Problem-Based Learning Method can increase the activity and creativity of students in learning opportunities in class XI, for active discussion there was an increase of 7.69% and activeness in recording lessons increased by 8.40%. 2) Problem-Based Learning Method can improve student learning outcomes in a classical way this is seen during the study an increase of 6.19%, and an increase of 39.30% from pre PTK to post PTK. 3) Problem-Based Learning Method can increase interest This is evidenced by the increase of 16.53% from pre PTK to post PTK.