I'm a little behind on posting these class sessions. The following are all charcoal drawings, starting with some gesture drawings of about 1 minute, and followed by 10 and 20-minute drawings. I can't remember which are which at the moment. In the longer poses, I try to look for the big shapes of black or dark areas and get them down on paper quickly---without trying to get it exactly perfect. Once I have the major "blobs," I go back and refine by trying to see (and making) more tonal differentiation between areas.
I do try to think of the lights and darks on and around the figure as "blobs of light and dark" instead of "leg" or "arm," because thinking about those areas as specific parts (for me) triggers the icon of "arm" in my head, which is not what an arm *really* looks like.