Here are the ideas I posted (under my real name):

This one is my favorite:
"Mr. Ratburn goes off work for a month or so, and the class is really excited because they think he is mean. The substitute is a really nice person who gives no homework and extra recess. Somehow Mr. Ratburn overhears the class raving about the new teacher, and his feelings are hurt. He resigns, and the nice teacher takes his spot permanantley. But the teacher's niceness starts to get annoying, and Brain complains that they don't get to actually LEARN anything will all the surprise parties and games! They realize that even though Mr. Ratburn is tough at times, they all still like him as their teacher. They "learn" that too much of a good thing is a bad thing, and that adults have feelings, too." (I also replied to my own post, saying it could be called "When You Give a Rat an Off Day".

I kinda like this one...kinda:
"Jenna (I want to include her because she has totally disappeared from the show! P.S. bring her back!) and Francine get into some kind of sports competition to see who is the REAL best athlete at Lakewood, and everyone is chanting them on, but Francine and Jenna are really tiered, but they don't show it. They finally agree to both forfeight and the other kids realized they were too enthusiastic (like in "A is for Angry"). I don't really like this idea, I just want Jenna to have an episode."

There's a Clifford episode exactly like this, I just was wondering what the respone would be:
"One of the main characters is moving away (maybe George or Fern; not someone TOO important) and everyone tries to give the best last day in Elwood City, and then the realize it was all a misunderstanding (I don't know how, just somehow)."