The teaching has been divided into the following 5 basic skills, each of which has its own chapter: learning the letter sounds; learning letter formation; blending - for reading; identifying the sounds in words - for writing; and tricky words - irregular words. Although the teaching has been separated into these basic skills, it is important to realize that they are all taught at the same time. The key advantages of this system are that it teaches children all the main letter sounds early on and to relate the sounds to the symbols and so understand the alphabetic code used for reading and writing.