Hmm....I don't think there are any complicating factors, although obviously you can never be sure. He doesn't seem to be having any problems, aside from losing his focus when he gets bored. But I think that's just being an 8 year old boy. I didn't realize that achievement testing was an option. His AR scores for reading are around a late 5th/early 6th level, and they test his math pretty regularly - he's around a 5th grade for that as well. Is that the same thing? Or should I look at independent achievement tests? I like this idea far better than the idea of IQ testing, for a number of reasons.