Good and Bad Uses of Tech in Public Schools?

skot asks: "I am a high school math teacher and recovering journalist working on an article about innovative (and insane) uses of technology in the classroom. I have seen schools plunk down thousands of dollars on handheld computers that teachers and students basically use as notebooks - fancy, expensive notebooks. I have also seen teachers try to forbid their students from using the internet in a research project. I'm sure many Slashdot readers have lived through experiences like this - and more. If you want to share your stories, I'd love to hear 'em."