I am working on a new Common Core set - 2nd grade language. I have already listed the first piece on TpT (Collective Nouns).
I don't know about you, but I like to have everything ready to go to teach and assess a standard. With these products you get several different types of practice and two different assessments to measure student learning.
These would be especially helpful in states currently adopting Common Core since (at least at my school) we are moving to Common Core, but don't have any materials designed around the standards yet.
First three comments get Collective Nouns free! (Although it is based on a 2nd grade standard it would be helpful in older grades as well - even middle school students need some practice with collective nouns.)