Increasingly, states are looking to enhance teacher professional development to better align with areas that may substantially improve student achievement. Already back in 2008, California enacted A.B. 2391, which allows teachers to fulfill half of an 80-hour professional development requirement with instruction on such areas as data analysis, alignment of assessment and instruction, implication of data analysis and its effect on increasing pupil achievement, impact on
pupil success through diagnostic teaching, differentiating instruction through
pacing and complexity, and statewide and local data management systems.