Hi Osh
Go to http://www.danbakerstrength.com, he has some great stuff there for training young athletes in his free web articles section on the left hand side. Be sure to download his explanatory notes. As well as the NSCA site, also visit http://www.startingstrength.wikia.com for very good, in depth techinique pointers on all the core lifts. Click on “The Main Lifts” on the right hand side. It’s great stuff!
Cheers