No matter what grade you teach in Elementary school, these resources should be able to help you.
This site is usually the first that I visit. It helps me SO much more to see an activity that the students would be expected to do. Definitely makes it clearer to me to helping unpack the standard. I also love, love, LOVE that they have easily printed activities as well!
Most states now have some sort of document for helping their teachers understand the standards. Even though I teach in GA, we tend to use this one from NC since they've had it out and available for over a year. It tells you in detail: practice, explanation and examples, the standard, what it looks like, and what the students should be able to do. It's perfect! Plus it goes K-8 and then the major areas/domains for High school.