Ask a class to write a persuasive paragraph and watch the groans. Ask them to design a theme park ride and convince you to build it — and they'll argue their case for twenty minutes without noticing they're doing the same thing. That's the appeal of project-based learning. The skills don't disappear; they just stop being the thing students think they're doing. If you're looking for project ideas for your elementary classroom, here are twenty that work — organized by type, wit