State Guidelines and Standards
Using science standards as an example, most state curricular guidelines differ from one another, sometimes substantially, as these links show.
And every so often national groups produce recommended science standards for the next generation.
This is the link for the Arizona Department of Education science standards.
You can find similar links for your state by searching Google for "[your state] science education guidelines".
As this Education Week article points out, "standards" vary widely between states. Page 7 of this article shows how different states address this controversial subject.
The results are surprising in that the states with the "lowest" scores are not the ones you would expect.
Correlating standards from a state educational agency with its complement in other government entities, such as Energy, naturally expand the available resources.
Courtesy of this archived site from the California Department of Energy, we learn that 1 BTU = 1 Peanut Butter and Jelly Sandwich, for instance.
In the 21st century, science standards are ever evolving.
Curriculum frameworks provide guidance for implementing the standards adopted by the California State Board of Education. It provides links to downloads of all curriculum frameworks.
Particularly, if you serve as curriculum specialist, it would be helpful to students in this era of mobile families to peruse comparisons among states so that the best mix is designed.