Here are the answers and tips for pages 4 and 5 of the workbooks. Open the attachments below...

Extension ideas: Why not go over number twenty and stretch to 100? Why not think of as many /ai/ sound words as you can think of and investigate how the /ai/ sound is spelt differently in each? 

e.g.   the /ai/ sound in grater is spelt as a-e (a split digraph) but the /ai/ sound in stay is spelt 'ay'