Trying to find out from them what they are, but can anyone here tell.
I think the one in the back may be a rir and another a buff orpington. The dark ones not sure about.
They could be mixes, usually classrooms will buy cheap mixes from local people. But if we could get close up shots would be nice.
The one you think is a Ameraucana, I think now, could be an Easter Egger. If it has a beard that is. The Buff Orpington would be more buff, that one almost looks splash. And that red one could be a Red Sex-link or a Production Red. The one that is drinking at the waterer could be a Easter Egger also, if it has a beard.