State governments administer education separately, the Department of Education's job is to make sure they are following federal law. The Department mainly administers federal programs that dish out funding to states.

Y'all really don't understand how education works in America and your comments make it clear for all to see.

By what yardstick should we then measure the DoEd's performance-per-dollar, or determine whether it represents "waste"?

Because it seems to me that a chief indicator that waste likely exists is an inability to show ROI.