(at around 1h 15 mins) When Bartleby receives the letter telling him about the meeting with the Ohio State Board of Accreditation, the letter says that the meeting is at 11am. But, when Bartleby and company arrive for the meeting, they tell the receptionist that their meeting is at 3pm.
(at around 17 mins) When Schrader is mopping, the bucket next to the water is filled with brown paint. When the scene returns to him (and he dips his mop in the bucket) the paint is now blue.
(at around 1h 9 mins) When Monica takes picture of the whole class you can see a flash, 'though her camera doesn't have flash.
(at around 1h 7 mins) During Schrader's "induction" into BKE, Gwynn's arm position changes between shots.
(at around 1h 19 mins) The board that all the student write the courses on throughout the movie is different from the board brought into the meeting with the State Board of Accreditation. The board is smaller and some of the courses that were written on the other board are not there.
(at around 1h 6 mins) When the fire alarm is activated at the party all the sprinkler heads activate and spray water. Automatic sprinklers use a metal alloy with a low melting point to govern activation. Only heat can activate a sprinkler head.
(at around 1h 1 min) After Bartleby gets done singing "Blitzkrieg Bop", he tells Monica he channeled the ghost of Johnny Ramone. Johnny Ramone was their guitarist. B would have been channeling the ghost of Joey Ramone.
There is no 'Ohio State College' in Ohio, rather the intended institution's real name is 'The Ohio State University'.
(at around 1h 28 mins) In the last scene, as Dean Van Horne is walking towards his car, he hesitates because he is anticipating the explosion which destroys his vehicle.
(at around 1h 6 mins) After Ambrose sets off the sprinkler system and the whole party decides to continue, nobody is electrocuted from the band instruments and equipment and such which are obviously plugged straight into the outlets.
(at around 34 mins) When Bartleby was addressing the student assembly, and the microphone was causing feedback, several shots of Rory at the mixer board reveals that there are no wires connected to the mixer board.
(at around 4 mins) When Bartleby receives his rejection letter from Ohio State College, the word 'that' should be 'than' in "We will receive more that 4000 applications...".
(at around 16 mins) In the first scene at the building that would become South Harmon, when Schrader jumps aside and shrieks, you can hear the scream before his mouth begins moving.
(at around 50 mins) When Ambrose asks the weird guy what is this place and he answers "South Harmon Institute of Technology, the best college ever", the camera is visible on the glass door.
When Bartleby and crew are walking into the "college" and the skateboarders come riding out, the angle changes and we see the camera men in the right of the screen.
(at around 53 mins) When Van Horn is riding in the golf cart, the reflection of the crew can be clearly seen on the hood of the cart.
(at around 48 mins) When Ben is lecturing to a large group of students in the center of the half-pipe, there is a black "X" near his feet (his mark), but in the very next scene it has been removed.
Camera shadow on Bartleby's shirt when talking to his little sister outside the school.
Although set in Ohio, there are several shots from by the pool area that show large mountains in the background, which Ohio does not have.
It's supposed to be October in Ohio but there are blooming flowers and palm trees visible in several outdoor shots.
(at around 1h 15 mins) When Bartleby is explaining to Hands, Glen, and Rory why they should get accreditation, right before Sherman shows up, the wall behind him has "Yen Chi..., Chinese Restaurant" painted on it with a phone number. This number belongs to a Yen Ching Chinese Restaurant in Burbank, California.
(at around 1h 14 mins) The return address on the letter states the Board of Accreditation is in Harmon, OH when in actuality all state offices would be in Columbus, OH.
The colorful board of the South Harmon "course catalog" has skateboarding misspelled, in large letters at the top right, as "skateboading".
Outlining his scheme, the Harmon dean asks Hoyt to help secure nearby decrepit properties, but pronounces it "decrepid".