Although I still conduct one illustration class, it is in my life painting classes that I teach painting and portraiture. Perhaps you've already checked out some examples of my student's work? If not you can at:
http://www.fineartportrait.com/works...s_gallery.html
I start my students out doing wash-ins (transparent monochromatic under paintings in raw umber). This addresses the two most critical factors in realistic painting, drawing and values. Color can be very off, but if these two factors are correct the painting will still read.
So from day one I am emphasizing values and specifically, estimating and comparing values (there is no other way).
If you really want to see all this in action, plus a much more effective flesh pallette than the one Reilly used, you should consider my workshop this June in Greensboro, close where you live. I think you could get a lot out of it.
I know time will fill, but so will my workshop. (sorry, I couldn't resist a little zen humor!) If you're interested, you can check out my online brochure at:
http://www.fineartportrait.com/oil_p...rkshop_nc.html