Hi Beth,
I wish! (On both counts...Daniel Greene being here, as well as having studied under him!) I haven't found a great deal on him online, although he is prolifically published. Here are a couple of place to get started:
http://www.johnpence.com/visuals/painters/greene/
http://www.portraitartist.com/halloffame/greene.htm
Try to get a hold of his Video, "Erica". It will inspire you! Daniel Greene's Book,"Pastel" is out of print, but check here, anyway:
http://www.amazon.com/exec/obidos/tg...21546?v=glance
Daniel Greene's wife, Wendy Caporale, has a recently published book, "Painting Children's Portraits in Pastel" , which you would probably also enjoy a great deal.
http://www.portraitartist.com/bookst...raitpastel.htm
The color numbers on pastel sticks make me get a twitch in my eye. The easiest way, I think, to determine their temperature is to test them one next to the other. Temperature is ALWAYS relative, so you would want to know, for example if a color you have picked up is warmer or cooler than the color you just put down. In any case temperature needs to work in the context of the painting you have at hand. When you test them, it needs to be done on SAME paper you are painting on, otherwise you won't be able to judge properly. When I am finished with a pastel, there are always 40 or 50 little test marks along one edge (to be blessedly covered with the mat board).