FYI. 25% can be used anyway the player wishes, but usually goes toward tuition unless the NLI states otherwise. Once it gets to a higher percentage, it can read COA. However, usually tuition is on the top of the list on your statement, amount deducted from your balance.
To arrive at each figure that counts as a percentage, it comes from the coaches budget. The budget if fully funded is COA (minus incidentials), times 11.7 which is divided (not always evenly) into 27 players. Interesting that there is a program out that coaches use, deducting funded amount as the offers are made.
Once again, states that have lotteries give players $$ towards tuition. This usually is more beneficial when attending a state school rather than private institution. Good grades are important.
FWIW, sons OOS scholarship was pretty high so that he would not use that benefit. However, times have changed, which is why state programs recruit state players.
Hope this helps new folks to understand how it generally works.