The research aims to determine the effectiveness of using blended learning Approach in developing student teachers teaching skills, and defining teaching skills that confront students of teachers college at King Saud University need it. The research uses the Quasi- Experimental approach, with four experimental groups (Mathematics (21)--Science (15)--computer (20)--Quran (15)). The research is limited to the students of practical course in the second term of (2010/2011) academic year. Additionally, it investigates teaching skills that are not excelled by student teachers. The research uses observation skill card for teaching skills with pre-post applied, while preparing and implementing a suggested proposal for developing skills of teaching implementation of student teachers, Results of statistical treatment indicated that there were significant differences between means of pre-post treatment in Experimental groups in favor of post treatment. As Students thought, these results indicated that Blended Learning helped them to improve their Teaching skills. More details of the results are discussed in the study. (Contains 2 tables.)