Idea that a country should focus on its own problems and avoid international commitments

Isolationism.
This is a theory that a nation's best interest is by keeping the affairs of other countries at a distance.

Who pays for the school education you are receiving?  If your family owns a home, then you and your neighbors in the community (other homeowners) are paying for much of it through property taxes on your home.  The majority of funds for public education--as well as guidelines and plans for local public education--are provided by the local areas where that education takes place. You have a local school district with a local school board.

Now, there are state funds provided too, and states set state-wide guidelines for education that all schools in the state must meet.  And their are national guidelines and some funding programs too.  But the majority of control of local schools still is in the hands of the local communities where that education takes place.

So support your local school board and cheer those who help guide funding and policy for your school!