You need a range of graded reading books for the programme that will engage the children who are receiving the programme (see the section on graded books). A structured sequential approach to phonics is used and some of the phonological aspects of the programme are delivered through the Sound Linkage book written by Dr Peter Hatcher.
There is a cost for the initial training course and buying the resources including a set of finely graded books and Sound Linkage. However once these start up costs have been met, the only further cost is the time of the person delivering it. This makes the programme highly cost effective.