This is one section of a Phonics Kit that you can create. Many of the resources are provided by the websites below for personal or classroom use. See the full post for more resources!
Vowel Teams that (usually) make new sounds (diphthongs) AU/AW, OO/OO, OU/OW, OI/OY
These vowel combinations are (mostly) not short or long, but make completely different vowel sounds.
Note that AU/AW is a diphthong that makes a Short O sound, and that OW can also make a Long O sound in some words (cow, blow).
Diphthong Chart from boostforreaders
Diphthongs from flyingintolearning
PLAY Online Games: special vowels and dipthongs at kizphonics.
For even more resources, check out my reading Pinterest board.