"Knowledge checks are nothing more than short assessments to determine if students are grasping the content of the material. These assessments can be graded (summative, which determine how much has been learned) or nongraded (formative, which support learning during the training process by identifying problematic units, lessons, or material within lessons when a majority of students are struggling). The results are used to identify weak areas in the instructional methods and modify instruction to make improvements."
Coffee Break Training - Training Programs and Tips Series No. TR-2012-3
United States Fire Administration: http://www.usfa.fema.gov/