how to use BIE's Project Planner that creates a simple two-page Project Overview form that can be saved and shared online. http://www.bie.org/project_planner
Exploratree is a free web resource where you can access a library of ready-made interactive thinking guides, print them, edit them or make your own. You can share them and work on them in groups too.
Share tweets publicly based on hashtags or other searches. Great for feedback. You could even use them in class to see what people are saying about current events.