%0 Journal Article %T The Science of Teacher Professional Development: Iterative Design Studies Across Content Areas %A Cynthia C. Griffin %A Mary T. Brownell %J Teacher Education and Special Education %@ 1944-4931 %D 2018 %R 10.1177/0888406417751032 %K teacher knowledge %K teacher learning %K professional development %K teacher preparation policy/service delivery %U https://journals.sagepub.com/doi/full/10.1177/0888406417751032