This Study was to mainly explore how students' opinions toward Physics Recitation for Mechanics as undergraduate compulsory course by using Peer Instructiion. Aslo it was to study students' achievement on Mechanics Recitation test. The qualitative and quantitative research approach were used to collect the data in the fall semester of 2014 at University of North Texas, USA. Both decriptive and inferential statistics were used to analyz the quantitative data. Meanwhile, qualitative data were collected by classroom observation and interview protocol. These data were analyzed by using content analysis. The result showed that their opinions were mostly positively, however, there were some concerns and suggestions to improve the course. For students' Mechanics scores on recitation test were statistically significant different at 0.05 level.