live figure drawing class, need feedback.

[mimer]

I've been going to the national museum in stockholm for a nude drawing from live models class for the past weeks. 2.5 hours each time, poses from 5 to 15 minutes, sometimes 20. Some light tutoring by the attending teacher but with so many attending it's fairly basic and I basically have access to a live model once a week, which is grea, but I could really use some feedback on my drawings.

If anything stands out as things I need to work on, any tips on what to do inbetween sessions to improve and get the most of the remaning 6 classes, it would be greatly appreciated. Here are some of the sketches ive made, and at the bottom, theres a link to the thread I've made for all the drawings from the class in the figure drawing link.

All feedback greatly appreciated.