We have 12 people in our class this semester. The first year group normally has more than that, and it seems to fade down to the ones that actually want to graduate in the later semesters.
We spend about 1 hour classroom, and 3-4 hours shop everyday. I have done suspension, rollcage, interior and exterior sheetmetal, etc. etc. Basically I have made the body for a IMCA modified, put the rear axle in it (after building the axle-welding tubes in housing), finished what was started of the rollcage(pretty much just welding the door bars in), putting shock hoops, and supports for the front frame, welding mounts for upper A-Arms (had to get a close measurement of caster/camber), and building the body (I made EVERYTHING for the car except for the roof, still have to make a hood and nose but that is about it.) Last semester we did engines, a few race motors were built, and I (with another person) built a chevy 6 cylinder that was going in a truck (steet truck, basically stock), but there was plenty of modifications on other engines in the shop, one included turning a chevy I6 up to 13.1 compression, all with leftover parts the teacher had from other engines, we will see how long it lasts at the track.
Dont waste your $$$ at NTI, go somewhere that you will actually do something...