This document summarizes a research study that examined the influence of teachers' professional competencies on student achievement. The study used a quantitative research design and survey methodology. Data analysis revealed that teachers' professional knowledge in terms of teaching practices and technology integration had a positive significant impact on student achievement. The study also found teachers had high self-perceptions of their professional development in improving professional knowledge and technology integration. The study concluded that teachers' self-development in content, pedagogical and technological knowledge significantly positively impacts student achievement.