20 States with the Worst Public School System in the US

2. Idaho

Pupil-to-Teacher Ratio as of Fall 2021: 17.5

SAT Mean Scores of High School Seniors as of 2023: 970

Per Pupil Expenditure on Education as of 2020-2021: $10,445 (In Constant USD as of 2022-2023)

Insider Monkey Score: 7

% of Graduating Class Taking the SAT as of 2021: 95%

Idaho ties with Oklahoma in terms of the Insider Monkey Score, with both states holding a 7 score. But with only 18% of students taking the SAT in Oklahoma and 95% in Idaho as of 2023, Idaho ranks second on our list of the 20 States with the Worst Public School Systems in the US.