Primary school Science teacher new to this site and needing advice on roos or hens?

[Chickadee64]

Hi guys, I took a couple of photos of the two (out of the 4) chicks that have the smaller combs and wattles and I'm hoping that these might not be cockerels? I'd love your input. All chicks are about the same size so that's not much help to me. I've scrutinised their plumage to see if there's any difference as I read that this can be a determining factor, but I'm not quite sure what I should be looking for. The legs on the other two chucks wirh the redder and larger combs and wattles are maybe a tiny bit thicker than these two chicks, but it might be wishful thinking in my part. Anyway, here they are...

 

[Chickadee64]

Wish I had a teacher like you, a real practical lesson has been taught and no doubt will be remembered for years to come. Hats off to you!

Ah, thank you! I am loving it and the kids know that I am learning at the same time as them.