Many national reports call for K-12 teachers to increase their content knowledge, expertise in student-centered learning methods, and skills in working with an increasingly diverse student population. Historically, most teacher professional development (PD) has not addressed these multiple challenges. We evaluated two PD models--research…

Differentiated instruction (DI) is nothing new and is believed to be an effective research-based strategy to cater for learner diversity. Differentiation involves finding multiple ways to structure a lesson so that each student is provided with an opportunity to work at a moderately challenging level. Previous studies, however, found that teachers…