So what are the best Teaching Apps?

A day would not go past that I do not get an email from a teacher or programmer who is pleading with me to publicize their iPad, Android or Windows app on Edgalaxy. And if we think the app is worthy enough we on occasion do so.

However, with the hundreds of thousands of Apps available we'd love to throw it to you to tell us what apps are great for teaching and learning and why?

Head to our discussion area on this topic and please be descriptive.

Shameless plugs will be allowed as long as they are short, sweet and relevant to teaching and learning

So here goes. Begin the Discussion.