Do your students have access to computers?
Test Your Geography Knowledge may seem a little elementary; alas — or maybe “hooray!” — it goes over exactly the sort of simple stuff I find too many high school students don’t have: Basic political geography. It beats Microsoft’s solitaire for in-class timewasting. (This is a show-off site for a programmer and company, Lizard Point; look at other stuff at the site, and think of what you can do with it.)
That site has a link to Quiz School. On-line quizzes, that you invent, that you can put into your classroom weblog — wonderful idea. What can you do with this tool? (It wouldn’t hurt you at all to post links to your quizzes here, would it?)
Back to geography: You’ll also want to check out Sheppard Software, and the collection of geography games there. The variety of games is quite outstanding — I even found one related to forestry.