General practice with charcoal and a new attempt to use Marker Pen

My usual warm-up session today of creating four or five quick sketches was a bit hit and miss... So we did a mixed "round-robin" approach, where each student made a 3-minute sketch of the model, then moved to the next left adjacent easel to sketch the next pose....

I found it interesting that the composition of the sketches changed so much with this method, nevertheless, it provided a good result!