At 4 he is on target. It's not about how much he retains; it's more about his interest and how he expresses it. He's fine-it takes time
Have you had him tested for dyslexia?
Absolutely. Dyslexia has been misdiagnosed as ADHD or slow learner and in reality, the child is neither. Please see if you can get him checked out. Ask Paschar about this. He is dyslexic and he teaches other dyslexics and he is a very kind and wise man. EP Link
Have him hang out with his friend Spud