The priorities accorded individual program components take on a particular significance once instruction begins. This is true because there is an expectation that, at the end of their instruction, students will leave with a more sophisticated grasp of the content associated with high-priority than low-priority program elements. It takes considerable time for students to develop in-depth understandings of complex content. The operational reality is that more instructional time needs to be devoted to high-priority than to low-priority content.