Valve allowed them to come into the building and teach them so.. later they can convert kids into valve workers, nice plan though.
I doubt all 20 of em will say:
Alright lets go to valve. Although it might aspirate them to learn more about source SDK, and pursue their career(s) in gaming industry.
I kinda lol'd how teachers were flipping out on a small map that probably didn't have a skybox in it