This study aims to determine the influence of learning discipline and peer environment on student learning outcomes in grade VIII social studies subjects at SMP Negeri 2 Kauman Tulungagung both partially and simultaneously. This research uses a quantitative approach with Ex-post Facto research type. The population in this research was grade VIII students at SMP Negeri 2 Kauman Tulungagung and 89 students were billed as a sample with proportional random sampling technique. Data collection techniques use questionnaires and documentation, while the data analysis used is multiple linear regression. The results showed that: 1) Learning discipline has a positive and significant effect on learning outcomes. 2) The peer environment positively and significantly affects learning outcomes. 3) Learning discipline and peer environment simultaneously have a positive and significant effect on learning outcomes. The Coefficient of Determination (R2) of the two independent variables is 0.625 or 62.5% of student learning outcomes in class VIII social studies subjects at SMP Negeri 2 Kauman Tulungagung.
Keywords: Learning Discipline, Peer Environment, and Learning Outcomes