You can find the Telekinesis spell in Redwater Den. If you have enough mana to cast it, it is the fastest way to level up possible (that i have found). Lift up an object with Telekinesis, then (while still holding it) fast travel as far as you can to the other side of the map. It should instantly max out your Alteration to 100 and level you up many times. It should still level you up multiple times until you hit max level. But, it's highly effective. You do
need to collect the Secret of Arcana power from the Black Book 'Filament and Filigree' in the Dragonborn DLC.
From level 59, I went up 3 levels. It's waaaaaaay more from the beginning.
1. Collect the Secret if Arcana power from the Filament and Filigree Black Book and the Telekinesis spell.
2. Equip the power and Telekinesis in your spells menu.
to activate your power and do the glitch from above.
(Powers take 24 hours to be used again, I believe. So you may need to wait a little bit in-game)