I am from another state where the local community college throw the book at you, and has no lecture of any kind, and the teacher is not avalable when you have questions, cause he is playing solitaire in class, but you can ask other students, that community college however has more classes on CAD programs than here. This college that teaches the Inv and SW is the ONLY one that teaches SW here within 120 miles, I have no idea about Inv, the jobs are in SW, that I have seen, so I enrolled into the school where solidworks was taught. The rest of the schools in the area have no drafting, they basically major in giving you a BS degree with 10-17 classes not in your field so you can get a BS in something, just not your career field. The local community college, has absolutely nothing for drafting whatsoever, which I find quite odd. Universities are a few miles away and would probably require completing another degree yet, but of a longer duration. This college is the only solution.
I can tell you my inventor teacher had us draw all the parts of an assembly into one part file, and when I asked him about it, he answered my question with a question, which totally upset me. Needless to say anyone that followed his technique had to completely redraw everything. I have had 3 classes with my Soldiworks teacher and he already seems more knowledgeable, and also seems to be of a higher calibur teacher than the Inventor guy. The Inventor guy however has been using Inventor for years, but why he said to put all parts into the part file to be imported into an assembly file later, is beyond me. The only conjecture I can make, is that he's lacking in the assembly portion of Inventor, or he wanted to try a new twist that he'd never tried before. Which is exactly what we're learning this term in Inventor.