In this resource, Janet Allen addresses the need to know adolescent learners and devotes her article to sources, strategies, and ways to better know students. She constructs her article powerfully, detailing three ways of being better able to choose what matters for adolescent learners: (1) Knowing Adolescents, (2) Knowing the Resources, and (3) Knowing the Research. Embracing the feasibility for change, Allen provides a thoughtful and research-based look at choosing what matters. (author/ebm)