When we think about ways the iPad has changed the world, our minds usually shoot to publishing, entertainment, or mobile communication.For the community of people living with disabilities, the iPad may have broken even more ground. The iOS device is not only cool, but provides education, therapy and, of course, entertainment.Last summer, Mashable explored ways iPads are making these changes. Now we’re following up with Sami Rahman, the father of 4-year-old Noah and co-founder of BridgingApps, the Internet’s largest database of special needs app and reviews.Noah began using his iPad when he was two and was assessed to be 12 months behind with language and cognition. Within four months, he was on par for his age. Now, two years since he began using the iPad, he is 15 months ahead developmentally, can read English and Arabic, and is learning Mandarin.