Free download for phase 1 of planning a concept-based lesson by Lynn Erickson's teaching theory. Download and brainstorm an essential question.Visit our Blog How To Teach GeographyThere is no correct way to teach geography, but there are some best practices. When I began my teaching career in geography 26 years ago in Memphis City Schools, Memphis, TN, the district was focused on concept-based teaching — teaching to the big ideas & conceptual-based learning based upon Lynn Erikson's concept-