happen when you fall below 900:
https://en.wikipedia.org/wiki/Academic_Progress_Rate#Sanctions
Teams with Academic Progress Rates below 900 face additional sanctions, increasing in severity for each consecutive year the team fails to meet the standard.
Year 1: a public warning letter for poor performance
Year 2: restrictions on scholarships and practice time
Year 3: loss of postseason competition for the team (such as a bowl game or the men's basketball tournament)
Year 4: restricted membership status for an institution. The school's entire athletics program is penalized and will not be considered a part of Division