Some students are fortunate enough to have some form of family financial assistance, but student loans end up financing a significant portion of higher education in the U.S. 45% of University of Louisville students receive U.S. Federal Student Loans with an average annual Federal Loan aid amount of $5,369.
Each training session provides a single level up for a particular skill, and the Dragonborn can train at most five times per character level. Unlike Oblivion, master trainers in Skyrim cannot advance a Dragonborn's skills beyond level 90. The cost of training grows as the Dragonborn's current skill level increases.
Taken from: http://www.uesp.net/wiki/Skyrim:Leveling. At higher levels, levelling up happens much more slowly. Level increases in Skyrim follow a formula. Prior to Patch 1.9 the maximum level was 81, since there was no way to gain any more experience once every skill reached its maximum value of 100. With Patch 1.9, individual skills can be made legendary, denoting them with an Imperial symbol.