I should start a category for inane or funny fan reviews on IMDB. I'd start with the Carebears one, but ones like this - for The Substitute 3 - would also make the cut:

It seems that every other movie in this series is bad, I guess that means we will have to wait for a fourth outing to get any entertainment. Treat Williams returns in the third installment of the series that again has nothing to do with the previous two. It's the same basic story except this time Williams discovers that the school is giving their athletes steroids. Again there is lots of unnecessary violence and this time filmmakers are throwing in some gratutious nudity to go along with it. I sure hope the next one is better.

I've only seen the first installment of The Substitute movies, but other reviews have said that the follow-ups followed the same basic plot: Badass Military Man (Tom Berenger in the first, Treat Williams (?!) in the rest) inserts himself into a classroom and beats the living crud out of the thugs/punks/racists/baddies in his class and cleans up a school while getting revenge for this or that. Pretty basic stuff.

So if violence isn't your thing, and the basic plot doesn't interest you, why are you hoping that the next one will be better? Why does the next one even matter to you? Come to think of it, why did you watch the last two? Lucy isn't even swiping the ball from your legs at the last second, Charlie, she's indoors watching cartoons while you're just kicking at air...