As you talk about Classroom Rules, you might want to use this hilarious Sesame Street Parody - "Share it, Maybe" - a parody of "Call Me Maybe" -- just so funny. (All they need is a baseball team in the back.)
communicate something online by recording a sketch, optionally with your voice speaking. Any sketch can then be embedded on your blog/ homepage for people to play-back, and you can also point people to your sketchcast channel here (or let them subscribe to your sketchcast RSS feed). Create a tutorial explaining how boomerangs work (and why they don't always return). Draw a doodle of your ex. Explain a math formula. Create a cartoon (you can use the eraser tool to make place for several panels of the cartoon). Get a partner and explain a concept together... voice recording doesn't have to be used by only one person! Write a love letter with lots of sketching inbetween. Create an online Chinese course and explain Pinyin writing. Create a masterpiece and show others how to draw. Explain baseball to Europeans... or explain soccer to Americans! Create a riddle for kids: draw something and the kid has to guess while you're drawing. Draw a manga action scene. Or many other drawing ideas.
Dow Chemical contacted Professional Learning Board asking what we thought of their new science videos for education. We think they're worth sharing with teachers!