In Case of Darkest Timeline: Each season of Community is based on the class that they are collectively taking.
From tvtropes:
Each season features the study group taking a class together with some sort of underlying theme. In the first season, it was Spanish and was built around the study group members learning to communicate with each other; in the second season, it was…
HOLY CRAP. This is why Community is the best show on TV right now.
Reblogged from What's there left to wait for?