The reason that I'm chewing on this topic is because of the way that I've been using the iPad lately in my classroom. For the most part, it has been used to replace the Interwrite/Mobii pad and interactive whiteboard. The iPad has been used to have students explain their work to the class using Educreations and ShowMe, create step-by-step explanations on a Comic using Comic Life, and other standard classroom operations.
Rather than turning him away, I looked into his October grades. Sure enough, he was missing an assignment gauging their knowledge of absolute value equations in one variable. It's a tough standard and is very easy to make simple mistakes. If a student wants to succeed, I want to give that student a chance. Why have a kid go back and do 20 problems to prove that a standard has been mastered? Nah. Here's the iPad. Here's a problem. Solve the problem and, in detail, explain each step and your solution. Oh yeah, he's an English Language Learner. Check out his work:
How do you use ShowMe or other screen casting apps for differentiation? I'd love to hear about it in the comments!