The US Department of Education website provides a list of all the individual states’ Department of Education websites. These links will lead you to information on each state’s educational standards, registration requirements, mandatory state testing, and much more.
(Yes, it’s really called Hoagies, which is what sub sandwiches are called in the Philadelphia area, where the page’s founder lives. Why? Read here if you are really interested.)
Hoagies is a fantastic resource for information on gifted learners and gifted education. Because gifted education regulations vary on a state-by-state basis, one page that is particularly useful in preparing for a PCS move provides details on gifted education mandates in each state.
Home School Legal Defense Association
The HSLDA website has all the information you could ever want about homeschooling laws, and this page provides links to homeschooling laws and regulations on a state-by-state basis.