Teacher Professional Development and Student Achievement GainsStudent success results from the work of competent, experienced, and qualified teachers. It is therefore necessary to improve the knowledge and skills of teachers to ensure student success. Investment in education must include the allocation of funds and time for the professional development of primary education teachers. There are many options for developing teacher skills and knowledge. The most appropriate approaches to professional development aim to achieve high student performance. Research conducted on teacher professional development focuses on teachers' personal traits and classroom activities. Research helps find the appropriate way to train teachers so that students achieve high performance. This article provides an analytical review of teacher professional development, which aims to increase student learning and achievement. The activities and content, which should be included in teachers' professional development, include student learning, teacher skills, and subject matter (Jogthong & Pimolbunyong, 2009). There are two categories of studies on professional development and student success. The first category mainly focuses on traditional teaching skills of teachers. A teacher's ability to allocate sufficient time for lessons is the area of ​​assessment so that the teacher adequately develops the ability to allocate sufficient time for student learning (Frampton & Vaughn, 2003, p. 292 ). Teacher development should therefore focus on the teacher's ability to apply critical thinking and consider all learning factors in...... middle of article..... wmann, F. (2001). Building school capacity through professional development: Conceptual and empirical considerations. The International Journal of Educational Management, 15(2), 86. Penuel, W., Fishman, B., Yamaguchi, R., and Gallagher, L. (2007). What makes professional development effective? Strategies that promote program implementation. American Educational Research Journal, 44(4), 921-958Ross, J. and Bruce, C. (2007). Effects of professional development on teacher effectiveness: Results from a randomized field trial. The Journal of Educational Research, 101(1), 50-60.Robinson, R. and Carrington, S. (2002). Professional development for an inclusive school. The International Journal of Educational Management, 16(4), 239Spencer, T. (2007). Cooperative education as a professional development activity. Educational assessment, assessment and accountability, 20(3-4), 211-226.