Improving student achievement in math and science has become a priority in the United States. As instructional leaders, principals can influence instruction in these vital subjects by working with classroom teachers to improve their instruction. Surprisingly, the research about the principal's role in supporting instruction in these subjects is…

The purpose of this study was to examine the relationship between different types of professional development, teachers' instructional practices, and the achievement of students in science and mathematics. The types of professional development studied included immersion, examining practice, curriculum implementation, curriculum development, and…