Modeling a head

HI my name is evan and I have no idea how to go about modeiling a head becuase there are so many techniques. which ones should I use? what is the advantage of modeling a nurbs head over a polygon? I go to rpi and my focus is 3d animation. Thing is I have been studying it for a month and I know more than the teachers do. it is a crappy situation and I have come to grips with the fact that I am going to have to teach myself how to use maya. I have the (Mastering Maya 3) book which walks you through a character development but the instructions for creating a nurbs head are not detailed and I cannot figure out how to do it. thanks you for your time

have a look at the gnomon organic modelling I and II dvd tutorials. www.thegnomonworkshop.com

HAHAHA thank you this is a treasure trove of information I greatly appreciate the input.

maybe you can get your school "rpi" to buy the DVD's or have fun spending 80.00 a pop! i would search the web more.. and post here.. and save the cash. Alot of times [not always].. the school will buy the Materials.. if they think all their students will benefit.

on the topic
here is a head resource i found useful here

and where the unfair advantage over your classmates in that