I've never figured that one out. I've always assumed the highest ranked candidates get the 4 yr (my guess is about 25% of all scholarships) and the rest get 3 yr. However, sometimes it is 4 Yr. to in state Publc and 3 yr. to Private. The 1st Board offers the greatest % of 4 yr., followed by the 2nd Board, and then the 3rd Board has little or no 4 yr. left.