The purposes of the research to improve activeness and learning result of accountancy at grade XI IPS 2 student of SMA Negeri 2 Surakarta by applying peer lesson strategy with snake and ladder media.This research uses Classroom Action Research (CAR). The research conducted in two cycles with each cycle consist of planning, performing action, doing observation, and reflecting. The subject of this research are the students of grade XI IPS 2 student of SMA Negeri 2 Surakarta that consist of 32 students. The data source from student, teacher and document. The data collected by doing observating, test, documentation and interview. The validity of the data used triangulation data source and triangulation method. The data analyzed by using descriptive analysis and qualitative analysis. The research prosedure used spiral model which is interconnected. The result of the research showed that by applying peer lessons strategy with snake and ladder media can improve the activeness and learning result of accountancy. The improvement happened in first cycle, eventhough it is not optimal yet. The performing of second cycle made both of teacher's skill and students' activeness get very good qualification and students' learning result reach very high qualification.