The first word mat is to aid in the teaching and learning of further graphemes, and learning to read tricky words. A pictorial example is shown of each sound to help the children remember the graphemes. Also on the mat are previous tricky words, which can be decoded in phase 5, and the 11 tricky words for chidlren to read.
The second mat contains the alternate spellings for phonemes on page 144 of the L&S document.

For software advice and support - please see FAQ link at the top of the page