During the last scene when Abed is shown the front page of the school newspaper, just a large headline and photo is seen. Then once he grabs the paper there's an additional headline in smaller font underneath the one seen previously.
Troy says that if they raise the blanket fort by two pillows in each corner, they can vault the ceiling and increase the square footage. This would increase the volume of the fort, not the square footage, which is a measurement of area, specifically of the floor.
In the fake gun scene, Jeff calls Annie Danny when she pulls the gun on him.
When reading over the list of night classes, Annie says that Professor Huyck teaches "History of Something", but when you look at the list, Huyck actually teaches "Learning!" while Bradford teaches "History of Something".