Educators and parents alike often wonder what secondary students remember from a class after the semester is over. This study examined that question by looking at test data for participants who retook their semester final 77 days after they originally took it. Students were retested in World Geography, Algebra II and Physical Science. The findings from the study raise questions about both how well high school students retain course information and the effects that various teaching strategies have on students' understanding of the concepts and skills on which they are assessed.