Very early on in this reading system, children find they have to look
carefully at the individual letters of words on the Disks, to differentiate
between some very similar-looking words. This gets them out of the habit of
"guessing" at every word, which a lot of children may do if they've been
faced with a wide variety of reading books. "Bricks and Mortar" starts them
back at the centre of learning by linking shape, sound and overall structure.
Children can very quickly lose confidence in their ability to read if they're
presented with too many unfamiliar words. Whilst they're learning (or
re-learning) the basics, using "Bricks and Mortar", try to ensure they only
use books with "linked words" for other reading practice - e.g. the Ladybird
scheme, or progressive stages of the Biff, Chip and Kipper stories on the Oxford Reading Tree - where each
successive book has similar vocabulary to the last, with just a few new
words.
The words won't be the same as the ones you'll find in "Bricks and Mortar" -
but if the child is grasping the basics of word structure and letter sounds
from this system, s/he will be able to apply that knowledge to other
words in other books - gradually. The important thing is that the new-found
[or newly-rediscovered] confidence and interest in words shouldn't be
shaken in any way.