Abstract The study aimed to identify The effectiveness of Using Self- Regulated Learning Strategies in developing Teaching Performance and Self -Efficacy among Pre-service mathematics teachers, the study sample consisted of (32) General Dibloma in Education Student -Umluj - Tabuk - Saudi Arabia , The researcher prepared list of Teaching Performance which includes (Planning - Teaching - Evaluation), The study tools included [Chick List teaching performance - Self-evaluation of teaching performance card - Self- efficacy scale ] The researcher regulated study tools statistically, and applied pre-study tools on the group of the study. Moreover, she tough the instructional content by using Teacher’s Guide and applied the study tools on the study group after teaching. Hence, she collected and statistical analyzed of the data, the study found that: * The effectiveness of Using Self- Regulated Learning Strategies for developing Teaching Performance among Pre-service mathematics teachers. * The effectiveness of Using Self- Regulated Learning Strategies for developing Self -Efficacy among Pre-service mathematics teachers. * There is a positive, strong and statistically significant Relationship between Teaching Performance and Self -Efficacy among Pre-service mathematics teachers.