I am unsure as to how this data was compiled but let’s go back to 1982 and look at the national report on education found in “A Nation at Risk” and then Gatto’s summary in 1995 “Dumbing Us Down”. https://www.nationsreportcard.gov/profiles/stateprofile?chort=1&sub=MAT&sj=&sfj=NP&st=MN&year=2022R3 Rob Wood
