letthembe
Those who have APD tend to need a whole word approach to reading, etc,
There are two ways children have APD either via a genetic link or via a severe ear infection such as Otitis Media with Effusion (Glue Ear)
APD is a listening disability, or not being able to process all that you hear. This can cause problems following conversations, following verbal instructions, processing sirens and alarms, all sound based information.
Most who have APD have problems processing the gaps between sounds, especially the sounds which can make up words, and between words in rapid speech. Those who have APD tend to learn to speak by reproducing the whole sound of a word, and when using the visual notion of speech, can only match the whole sound of a word to the whole visual graphic representation of the word. So the whole concept of phonics can only be an abstract idea with no practical application for those who have APD.
As you are no doubt aware the three main learning styles are Visual, Auditory and Kineasthetic Those who have APD are not very good at using auditory learning skills or abilities, and will have already begun to develop alternative compensating skills and abilities to work around their deficits. Some will prefer to develop the visual learning options (especially natural visual-spatial learners).
We have a Management of APD article on the APDUK web site which was the result of the first UK APD Research at Sheffield University before the Medical Research Council began their APD research program in 2004. It is a presentation hand out which lists the various support programs and how they can help within an APD context.
And from the APDUK web site you will notice the use of multi colour text, which is an APD coping strategy some children like to use the same concept different colours for different letters, the n different colours for vowels and consonants, then different colours for nouns and verbs, and then on to phrases and then sentences, which many adults who have APD can use to help they copy and paste a form or document into a word processor. Unfortunately this is not possible with books or Kindle, yet.
From what i remember Toe by Toe uses a kineasthetic approach. But you will need to find out which learning style or teaching mehtods best suite your DS
I hope this helps