Wow what an amazing idea to teach the history of the atom to students with learning difficulties. Not only the atom but this method of teaching can be applied to any number of teaching topics. I've also incorporated this activity into my Atomic Theory Lesson, link in the article.
Here's how not-scientific I am: I didn't know scandium was a real element. I bought this shirt anyway. ("I mean, I'd try to explain what I do, but you probably wouldn't understand, so I'll save my breath. Because that's breath I might need to do all my sciences.")