http://www.active.com/football/Articles/Crunching_the_Numbers__Football_Scholarships
NCAA Football Bowl Subdivision (FBS)
How many schools: There are 120 schools competing in the FBS (formerly Division I-A), the highest level in the collegiate ranks. This includes the big programs like Michigan, Ohio State, LSU, USC and Notre Dame.
Scholarship count: FBS programs are allowed 85 scholarships on its roster at any given time, and generally can sign up to 25 players per year.
Scholarship breakdown: All 85 scholarships are full rides. There are no partial scholarships given in FBS football.
NCAA Football Championship Subdivision (FCS)
How Many Schools: There are 125 schools competing in the FCS (formerly Division I-AA) in 2008. This includes all of the Ivy League schools and FCS powers like Appalachian State, Georgia Southern and Northern Iowa.
Scholarship Count: FCS schools have 63 scholarships to be distributed, and up to 30 incoming players each year can be given aid.
Scholarship Breakdown: Scholarships at FCS schools can be full or partial rides. The 63 grants can be divided up in any way, but no more than 85 players can be put on scholarship.
NCAA Division II
How Many Schools: There are 156 schools competing in NCAA Division II. Some of the more well-known Division II football programs include Northwest Missouri State, Valdosta State and Grand Valley State.
Scholarship Count: Division II programs have 36 scholarships to be distributed, though some conferences don't allow their schools to have that many.
Scholarship Breakdown: Football scholarships at Division-II institutions can be divided among as many players as a program wishes. Most Division-II players are on partial scholarships.