I am one of 10 California teachers suing to end compulsory union dues in Friedrichs v. California Teachers Association, which will be heard by the Supreme Court Jan. 11. Our request is simple: Strike down laws in 23 states that require workers who decline to join a union to pay fees anyway. In our view, paying fees to a union should not be a prerequisite for teaching in a public school. No one in the U.S. should be forced to give money to a private organization he or she disagrees with fundamentally. Teachers deserve a choice.

I...