This is NOT a Ferris Bueller rip-off. About the only thing the twomovies have in common skipping school (in Ferris Bueller's case 3people, & here the entire senior class) & an obsessed principal whogets into trouble.
Unlike Ferris Bueller, the main character Adam, is not cool but tryingto become cool and he is trying to win over a girl. Also unlike FerrisBueller he does not have an adventure going around the city, but isthrowing a party at his house. There is a sister involved, but she's onhis side.
In other words, the movie is an original, not a copy with lots of funnymoments and likable characters. If I had to compare it to any movie,I'd compare it to Can't Hardly Wait, although that was more of aromantic comedy, while this movie is pure comedy.