Here is a set of flash cards with dotted letters for the phonemes of Phase Three. Laminate them for children to trace over with a dry wipe pen perhaps?
All Phase Three Letters - Flash Cards - Dotted
Here is a zip file of all the suggested words for Phase Three (apart from the "tricky words") with "sound buttons" underneath which the children "press" as they read the phoneme above.
Here are the suggested "tricky" words to be introduced during Phase 3 to add to your collection of word cards.