What is the difference between "Comprehensive" and "Progress" Knowledge Checks?

There are two types of Knowledge Checks  in ALEKS. A Progress Knowledge Check generally focuses on the student's recent learning history. It generally has fewer problems/questions than a Comprehensive Knowledge Check, and is intended mainly to check the students' retention of material recently learned. A Comprehensive Knowledge Check covers the entire content of the course. They generally have more problems/questions than a Progress Knowledge Check, and are intended to check the students' knowledge or retention of material throughout the course. A Comprehensive Knowledge Check is appropriate, for example, to use as a final exam or practice final.