Depend on them?

A couple of weeks ago, we had the big yearly inter-city Junior High School Speech Contest. One of my schools had NO KIDS interested,
the other had so many that we had to have a mini-contest at school to pick the kids who would end up going. 
I had already been coaching one third year girl who had been working on her speech since the summer break, and also helped the other third year girl; both of them came to me on their own and asked for help. The first and second year kids never said a word to me; in fact I didn't even know who the first year kids (two boys and two girls working as pairs) WERE, since they didn't have to be part of the mini-contest. I figured the teachers must have been helping them.
....
So two days before the contest, all the kids get called to present their speeches to me (I was also a judge at the speech contest) and the English teachers. The third years are prepared. They do awesome. The first year boys are fucking amazing (in fact, they took first place in their grade) and I can't believe how well they've done without any help. The first year girls are prepared; they could use a little work (one of them is too stiff-- they're doing small skits and she just sort of stands there), but they're fine. But the two second year kids?
What a fucking DISASTER. Memorize their speeches? HA! They hadn't even fucking finished writing their speeches yet!! And all three of the teachers who handle the second year kids are sitting there wondering who is at fault. UH, HELLO? IT'S
YOUR FAULT for not staying on top of these kids. I don't think they even knew when the contest was! Now, I really like the teachers I work with. They're good people, but they fucked up here, and they knew it...but they didn't say a word. I actually found myself a little angry at them for the first time ever.
Then they asked me to stay and work with these kids, which I did, no complaints, and even showed up the next day to coach them even though I had to work at a different school that day. I stayed way late at work helping these kids...no one asked me to, but I did it anyway. And the teachers never bothered to help those kids. Not even once. But that's how it goes. Really, when you think about it, it's not your problem if the teachers fuck up. They are the ones who look bad, although unfortunately you may look the same by association.