Mrs. Ash needs to use direct instruction because she is teaching basic skills that involve factual information and she has only one week to teach the unit. Direct instruction is an effective and efficient approach for teaching basic skills and facts. Mrs. Ash might effectively use advance organizers to help students organize information about the various types of Indians. For example, if they study four different types of Indians that lived in different parts of the country and built different types of dwellings, and advance organizer helps students develop schema that compare and contrast these differences.