School quests can earn you some currency and a few items. The quests can only be done once. Each island has a school and their own set of quests. Most quests involve seeing a quest giver and then seeing another NPC or a series of NPCs. Basicly a message deliverer. You then return to the quest giver and collect your reward. For walkthroughs of the quest visit these pages for each island.

Clannad Island Quests

Da Capo Island Quests

Shuffle Island Quests