My 12 YO who I believe has mild stealth dyslexia has almost finished Barton 6 and is still having trouble with some multi-syllabic words. She always has to slow down a bit to decode the ones she doesn't know by sight, but not infrequently one stumps her. Even when she divides it on paper she still has trouble sounding out each syllable and then putting it back together. I can't figure out what the hang-up is because they don't seem to be any more complicated than the words she does ok with--it might be a word like compilation or intricate. I don't know if she's mentally confusing it with another similar-sounding word or if she gets a little anxious and freezes a bit or what. I went back and did Level 1 which she'd tested out of and she had no trouble with that, and we reviewed the syllable division rules in Level 4 also and that didn't help either. It's not an issue of knowing how to divide them, it's something else.
Any suggestions on what might be causing this or how to work on it? The only thing I can think of to do is find some multi-syllabic nonsense words somewhere and have her work through those. She can read somewhere between 50-90% of the words (depending on the lesson) in the Barton lessons fluently at the start of each lesson so I don't think she gets as much practice breaking words down as most kids who do Barton do.