My best guess is you would have to go back 50 years or maybe check home schooling resources, of course none of those would be allowed in the public school system, you might get away with using them as a supplement if you do so quietly you know this would be a case of asking forgiveness is easier than asking permission, if that still works in a zero tolerance government education world.
You are likely correct - I did a search for the US history books I used in grade school in the late 50s, but could not find them ... were by Morrison and Commenger (I think the spelling could be off) was a two volume set.