Unions | Teachers Union Facts State Education Rankings: The Best And Worst For Math And Science All of the "well above average" states for math & science have > 75% unionization rate. All of the "above average" states for math & science have > 75% unionization rate except Virginia. Of the 9 "far below" average states, 6 have a unionization rate below 45%. Clearly its not the unions causing schools to do poorly in math and science. Any suggestion that they are doesn't doesn't jive with the facts.