Nice. They all look a little.. elongated, though. Also, the eye on the first one is bothering me a bit. Maybe it's a little too high. I wish I could give a better crit, but there's not much to crit.
Some portraits from class tonight:
A more polished one of the model we had in the 2nd half of the class---
Two really quick warm up gestures (two classmates as they draw)---
Did those last two as we were waiting for the model to get there.