A lot of children learn to read at school by using phonics. This is the method by which words are broken down into their sounds and children learn the sounds in order to work out how to break down each word and sound it out. They then put the sounds back together to work out how to pronounce the word. So by using this method your child will be able to learn how to read.
If you want to help your child at home, you will need to understand the reading methods that they use at school. If the school doesn’t help you with this, there are many sites online that will be able to teach you about phonics. The good thing about this method is that all schools teach the phonemes in the same order, so whatever site you look at and use to help your child, you know it will be doing things the same way as the school will be. There will be plenty of fun games to use to help your child learn, and this is the best way of engaging them and keeping them interested in their learning.
In order to know how well your child is doing with their reading at school you will need to have some method for testing which sounds they know and therefore how advanced their reading skills are. This will help you to choose exercises which are suited to the reading level that they are at. In order to do this you can’t give them a normal reading rest as this only tests their knowledge of words, it is a phonics test that they will need. From this assessment you will be able to find out which sounds they are struggling with and be able to help them with those.