An example of "home schooling" is presented by the Iowa State Department of Education at:
https://educateiowa.gov/pk-12/options-ed...-home-schooling

That is one example - requirements and expectations vary from state to state so your local Dept. of Ed. is your best resource locally.

The issue can quickly get political so be sure you are researching actual information for your location and not just a nice site of information with a 'slant' on issues.

Private or home education materials are also available for parents to use in developing an approved curriculum.