Magic icons will be put up at a later date with a little more in depth on them, but you can get the jist on some of them. Fire is fire magic -wiggles fingers-
But the icons can be used as symbols for magic users to use to either portray what sort of magic they study in, or for a school to display the type of magics it teaches.

Note: Time, necromancy, and life are TABOO, but that doesn't mean you're not allowed to have your StarDragon practice it! Elliott there who seems a little too pro-taboo is a necromancer himself. Just lore wise, someone who dabbles in necromancy wouldn't loudly-proudly state it in the streets because they absolutely would be immediately apprehended.
Well Meaning Citizen With A Heavy Interest In Robbers on the streets, Necromancer in the sheets.

Top Panel Symbols from Left to Right: Arcane, Fire, Water, Air, Earth, Lightning, Light, Darkness
Second Panel Symbols from Left to Right: Time, Necromancy, Life

Art by Raptorslut
Words by Cloneclone and missmab