He did pass the Barton screening, we haven't started yet as we are waiting for school to finish -- and watch apparently a very long DVD for parents LOL. Thanks for the suggestion on shorter lessons, I doubt he has the attention for longer ones so we were going to try shorter lessons but more frequently and see how he does. And yes, the eval suggested that we re-think him doing 2 languages, and we very well may in the future, but he is at a small school where he (and most of his classmates) has been since age 2 --he's now 8.5 and does NOT want to leave his second home. We are worried that would be more traumatic for him right now. We are going to work this summer with him and hope to have some help next year and take it bit by bit.
Actually, if you have Level 1 already, you might go ahead and start watching the video now. It is kind of boring but you don't have to sit through the entire thing in one sitting. Just drink lots of caffeine and it should be fine doing the DVD in short bursts. It should be really helpful for wrapping your brain around the system. Read through the TM as you watch the video. That can help, too. It may take some quiet practicing to get used to the hand gestures and interacting with the tiles. I would definitely practice a bit before starting the lessons.
Level 1 is very short, by the way. Unless he has other issues (such as an auditory processing disorder of some kind) he may be able to get through Level 1 in 2-3 weeks, possibly much sooner (although possibly much longer depending on how serious the issues he is encountering). Level 2 will take longer but again unless there are additional underlying issues he might make it through Level 2 in 2 months, maybe significantly less. Level 3 will take longer. It has a lot more lessons and the lessons are each much longer. Still, he might make it through Level 3 in 3-5 months, maybe less. Level 4...is not an easy level. And takes a really long time and a lot of effort for most kids. In fact, for many it is by far the hardest level of the 10. Plan on taking a significant amount of time with Level 4. Maybe 6 months to a year or even longer. The other levels after 4 usually (but not always) go faster than Level 4.
The main thing is not to rush since the goal is not to memorize the rules (which dyslexics are usually quite bad at) but to learn, master and internalize the rules. Dyslexic kids frequently need a whole lot of review to master language based learning, especially to the point things are internalized and automatic.
i did want to mention that if you think he would like games to reinforce the Barton lessons look into the Spelling Success card games. They were designed by a Barton tutor and are specifically for Barton. I don't know what shipping costs would be but they are great for reinforcement and for keeping lessons going if you are having a bad day.
Good luck and best wishes. I hope you both have a fantastic summer.