When I reflect back to early versions of iOS and the workarounds that teachers and students used to have to jump through hoops to complete through third-party applications, the iOS operating system has come a very long way from where it used to be.

Source: Ten things every educator should be able to do with their iPad – ICTEvangelist

Although I disagree with the title of the article, the list of tips is very useful. This is a great overview on 10 things you can do on the iPad.