The sp system is like the use of money instead it not money OFC but u can do thins like
-buy retest item
-take the god dorm challenge
-host tournaments (with tournament item)
Now I bet you asking "How do I get SP?" we here are some ways
1.) doing your Homework
2.) winning tournaments (that give Sp as a prize)
3.)getting new members
4.)winning duels against OTHER MEMBERS IN THE ACADEMY
5.)Doing extra work around the academy
(mods, and teacher get paid 100spat the end of the week) so you really don't have to do it
but this is the way to use them and get them
how much you get will depend
50(for Homework)
100(for ever new Active member)
30(for winning duels against other members
10(for doing extra work around the academy)