Classical Drawing and Croquis

For the last couple of weeks we have been drawing like crazy! We have been taught the basics of classical drawing and croquis, and I must admit: sitting still for 1-3 hours while drawing a woman who just won't stand still long enough (!) is harder than it seems, even with 15 minute breaks. But I have really learned a lot! After just two days of drawing croquis I could see the difference in the way I draw, which is awesome :D

These are some examples of 30 seconds and 2 minute sketches with coal:

The following sketches are made in 10-15 minutes, also with coal:

The next three are all made in 45 minutes with a regular pencil:

The last three drawings / sketches have nothing to do with croquis, but are simply "freestyle" drawings for my sketchbook, made with regular pencil and colour pencils: