Steps 1 to 12 introduce letters and sounds in a systematic order. Each Read it yourself book is very carefully written to include many key, high-frequency words that are vital for learning to read, as well as a limited number of story words that are introduced and practised throughout. Simple sentences and frequently repeated words help to build the confidence of beginner readers and the four different levels of books support children all the way from very first reading practice through to independent, fluent reading.