It's probably true . I taught for 35 years and there are a LOT of CLOSET conservatives in education . Most keep quiet as to not cause problemswith their career . Policy is not made by the teachers , it is made by the legislatures and governing body of NEA .
I taught for 28 years in both public and private schools. I've been awarded several times as a teacher. The reason I was a very effective teacher had nothing to do with curricula, mission statements, or workshops. Behind closed doors, I directly taught basic skills first, than I taught how to effectively use those mastered skills. The typical class average for entering third graders was 2.0 - 2.5 in math and lauguage areas. The class average for exiting third graders was typically in the range of 5.5 - 6.5. Unfortunately, more and more teachers are simple-minded handmaidens of the NEA, and PC driven state and local curricula.