Applikaatio esimerkiksi matematiikan kertaamiseen/oppimiseen aivottoman selaamisen sijaan?

Brilliant - Understand concepts and build your problem solving skills with thousands of free problems and examples in math, science, and engineering.

Anki is a program which makes remembering things easy. Because it's a lot more efficient than traditional study methods, you can either greatly decrease your time spent studying, or greatly increase the amount you learn.