Looking for help identifying breed

[Meadow3023]

This is the first flock I've owned. I have 7 chickens from my son's Biology class that are now 14 weeks old. I have a few that I'm hoping to identify. Here are photos of the first one.

 

[Alexandra33]

Mixed breed. She's beautiful!

~Alex

 

[Gray Farms]

Crossbred. They vast majority of "classroom" chicks are crossbred. Not all though, but this one is.

 

[Brahma Chicken5000]

Cross breed. Seems like nowadays more and more class rooms are sourcing their eggs locally instead of from the factory farms.