"Teachers like myself in California are represented by the California Faculty Association (CFA). You do not have to be a member of the union, you can choose not to be. However if you choose not to be then the union still legally charges you 75% of the dues a normal member pays."
I seem to remember Gov Schwarzeneggar submitting a proposition that would require people to have to "opt in" in order for the Union to withdraw from teacher's pay checks. I also remember the storm of anti-Arnold ads that quickly ensued saying the Governator was taking money away from Education. In California, the Governor can't use state funds to campaign for his propositions, so guess what, everyone voted against it. Union's serve a purpose, at certain points they are necessary and vital, but they can quickly become the beast that cannot be fed. Ask anyone in Michigan and wonder why the automakers left. Its the nature of power bases to consolidate and increase their power.