Unless otherwise noted in a specific report, the AACRAO member institution size, type and control categories are based on the following definitions and sources: 
The enrollment value used to delineate the institution's size category is defined as full-time enrollment plus 1/3 of part-time enrollment and is based on the enrollment reported by the institution to the U.S. Department of Education's National Center for Education Statistics (NCES). 
Institution type and control values are also defined by and verified through NCES criteria.

Academic Progression and Institutional Policies

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Some institutions responded that they had different minimum GPA requirements depending on the number of credits completed.

Some institutions responded that they had different minimum GPA requirements depending on the number of credits completed, whether it is an undergraduate or graduate program, first-time freshman vs. other student, or first vs. second semester. For schools that said they do not use GPA, some of the other minimum achievements required for a student to re-enroll for the second year are included.