“…Table 1 shows the year of passage for each state as well as the set of states without such a law. 5 Of the 17 non-DTB states, 10 allow teachers to collectively bargain if both sides agree to do so. Four states (Alabama, Georgia, North Carolina, and Virginia) have no state law governing teacher collective bargaining, while three states (Mississippi, Missouri, and Wyoming) outlaw collective bargaining.…”