You will also be helping the class teacher by sharing some of their responsibilities and giving them a chance to concentrate their attention where it is most needed. It is the teachers' responsibility to teach reading, but your assistance will mean that you can work together to help children become better readers. Your approach to hearing your child read will depend on his age and ability. Talk with children about the book they are reading. With younger and less able readers, talk about the pictures.
Pictures help children to understand the words.
With older and more able readers, discuss the characters and the words and phrases used by the author. When a child doesn't know a word, ask him or her to try it and then tell the child what it is. Only get involved in 'word-building' if the teacher has asked you to do this. Use lots of praise and encouragement, and avoid criticism. It is important that the children become more confident with reading.