Programs that prepare elementary teachers have a daunting responsibility -- they are readying the people who will teach children reading and numeracy, build a foundation in STEM and social studies subjects, all while providing many children's first introduction to formal schooling. By rising to this challenge, programs may also help a more diverse cohort of teachers reach the classroom. Given the magnitude of this task, programs may run into a few hurdles along the way. This "Action Guide" is designed to help programs address the set of challenges associated with building the content knowledge that teacher candidates need to reach the classroom and succeed once they arrive. [For the related report, "A Fair Chance: Simple Steps to Strengthen and Diversify the Teacher Workforce," see ED593388.]