So our nephew has proved that the acorn doesn't fall far from the tree: he's running a D&D game with his friends.
His mother (my sister) says he would really love to have some more scenarios to run.
I've found a couple of things on Amazon, but I'm wondering which modules you think would be the best for a novice GM who's in middle school. He's bright, reads really well, is a Tolkien fanatic ... but still, just 12 years old.
(WOTC's site is less than useful. You can't even do a query for 4th Edition + adventures (or scenarios, or modules).)
Also: GM/DM screeens: useful, or not? I never used such a thing back when I was running my own games, but some of our more recent GMs like them.