This is a very conventional method in fact many of us have learned to read using this method. With this method , the teacher reads out and the child will repeat after her.
This method is effective because when children read a text generally they understand the message in the text. Unlike learning to read words as reading words alone do not make any sense.
However there are minor drawbacks in using the traditional method.
Firstly it takes a long time to learn. Only limited words are taught to the child at a time. The text or the passage must have a continuation and the same words will have to be repeated. Secondly some children find it very hard to follow this method. Thirdly this method can be boring because the story lacks mystery or suspense . As the text gets longer and longer children may lose focus on the new words that is being introduced.
However this method of teaching is still nevertheless the best methods if the parents and Educators know when to use it and how to use it.