My DD's preschool did a system where "Annie Apple she says A" and so on through the alphabet, a letter a week. I know they switched to a more Australian specific program this year, but I can't remember what it's called. They learnt to write, recognise and say the letters one by one.

I also got DD the Wow! I can read series that she loved. They work through letters in order of importance/use. Tracing and recognition of letters and words that start with them.

We did this in a very informal, this is a colouring book/activity way, not teaching as such.