The oa vowel pair is generally tricky for students, so we've devoted a full level to it here. In these ten examples, the oa pair makes a long o sound (once again, "when two vowels go walking, the first one does the talking").
We've seen many students accidentally use ou instead of oa (as in throut for throat) or use a long o + silent e instead of oa (throte), so this level is a great one to hit hard!