My son is 5 years old, and he has problem of reading books with big sentences with letters like “there”, “again”, “where”, etc. He does not know how to join letters like th+ere = there. Would you suggest some kind of books that have simple sentences then big sentences so he will have confidence?

It sounds like you’re asking your 5-year-old to read some very complicated words. Words like “there, where, again” are not using phonic rules, but more complicated rules like blends, digraphs, and sight words. Many of those words are second grade words. They’re pretty hard for most 5-year-olds to read unless they are reading on an accelerated first grade level or second grade reading level.

I would suggest that you find books that are more age/reading level appropriate to a 5-year-old. Your best bet here would be anything that is phonetically based. That way he can learn the phonetic rules to our language. Once that foundation is solid, then you can add concepts like blends, diagraphs, and sight words. Good luck and enjoy the process of working with your child.