Hello badtertle,

Wow, a set of four pots in a fairly short amount of time in NURBS, and you have a full load of classes? That's a pretty tall order!

My advice is to do just one pot if your instructor will allow for that (perhaps the human headed one?) and then if time permits, copy, then alter the one into several human headed versions. (perhaps you could go for a canopic set with just Pharohs heads such as Akhenaton, Ramses, Khafre, Seti?) That way you will not be frustrating yourself with a goal that may be too difficult to meet in such a short amount of time. NURBS are as Jay would say "fussy," or at least they can be somewhat difficult or problematic. Of course, this is just my humble opinion.

What method are you using to model your NURBS? Are you lofting between curves drawn in profile? (like this?)
https://www.3drender.com/jbirn/ea/HeadModel.html

Or are you modeling NURBS patches? (like this?)
https://www.3drender.com/ncf/index.html

That will tell you where you will need to begin with the head. In patch modeling you start with the eyes and mouth first and work outwardly from there. I think the first method is probably much easier to learn, patch modeling can be sort of advanced stuff.

I hope this helps! Looking forward to seeing what you come up with!