STAD LEARNING MODEL TO IMPROVE ABILITY TO SOLVE STATISTICAL PROBLEMS IN STUDENTS IN CLASS XII MIPA 7 SMA 2 KUDUS 2 YEARS LESSON 2018/. This class action research aims: 1) Determine the magnitude of the increase in mathematics activity and learning outcomes in statistical material, using the STAD learning model in class XII.MIPA 7 students of SMA 2 Kudus for semester 1 of 2018/2019 academic year. 2) Describe the changes in mathematics learning activities and statistics material, after applying the STAD learning model to students of XII.MIPA 7 SMA 2 Kudus semester 1 of 2018/2019 academic year. The research method uses Classroom Action Research with 3 cycles. Data collection techniques through: 1) observation, 2) questionnaire; and 3) test. Data Analysis Techniques with comparative descriptive techniques and interactive analysis techniques. The results showed an increase in cycle I to cycle II for the level of activity reaching 42.86% and completeness of learning outcomes reached 55.53%. Furthermore it can be concluded that Statistics learning with STAD learning models can improve student activity and quality of learning outcomes and can improve students' abilities in completing statistics.