From Penniless Parenting (click the link to read the entire post)
...Most states have developed a standard curriculum. I assume that this is because they want to ensure that all children graduating within that state have covered certain core subjects.
Lucky us, because many states have made their "curriculum standards" available online. To find these curriculum standards, you just enter curriculum standards and the name of a state (i.e. "Washington Curriculum Standards") into the search box and search away. Being a native Ohionan, I searched and found their curriculum standards online.
I came across a few different state's curriculum standards, but the one I liked best (because it is easiest to figure out and understand) was the one I found for Tennessee. Tennessee Curriculum Standard- if you click that link, you'll see a list of different subjects as well as Early Childhood, each of those being links to pages with curriculum standards for each grade...
I personally really enjoy the Tennessee link :)