The Fedeeral Government(Us) should just make a required and level playing field for all students of a certain grade or level. This assuring that the students are all at that basic level.
Then if the State wants to go further in the advancement of the students education, then by all means do it. This is one way a State can attract the citizens to their State. This should be up to that particular State.
Sorry to say this, but this should be a States Rights matter.