Why and when should be use decodable reading books?

Decodable books are those books written respecting the synthetic phonics, allow children to decode the words by applying the sounds they have learnt.  Their use proves to be a reinforcement of their learning experience, but above all an extremely motivating activity. From the early stages of using Jolly Phonics, students are able to access and read books in English!  The read and see are very simple books, within which the children read the word and uncover the answer to check they have read correctly. From here, students can move on to the levelled readers; a wide range of stories divided into four levels, which complement the new concepts, such as tricky words or alternative spelling, introduced within the methodology.  Once level four (green band) books are reached, children will be confident readers, ready to move onto non-decodable books.