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The learning model is the design of learning activities so that the implementation of learning achieves its educational objectives. Learning is a process carried out by providing education and training to students to achieve learning outcomes. This study aims to determine student activity during the application of the Cooperative Learning learning model of the numbered Head Together (NHT) type and to determine student learning outcomes after following the application of the Cooperative Learning learning model of the numbered Head Together (NHT) type. This type of research is Classroom Action Research (PTK), this Classroom Action research was conducted at MA Ibrahimy Secang Kalipuro in class XI, Semester II. The subjects to be studied in this study were XII MIPA classes with 26 students. Data collection techniques used were observation, interviews, tests, and documentation.  Data analysis was done in the form of descriptive statistical analysis. The data analyzed were student activity observation data and test result data. The results of this study showed that student learning activities in cycle I obtained 72% and increased in cycle II to 100% then student learning outcomes in cycle I obtained an average value of 70.76 with 57% classical completeness and increased in cycle II from an average value of 89.96 with 96% classical completeness.