Joining WCA PTA means you are also a member of the California State PTA and National PTA!
There are extra perks of membership available to California State PTA members, including: Google Express, Aquarium of the Pacific, California Academy of Sciences, Enterprise Car Rental, and more. Read about them all at http://capta.org/join/member-perks/.
At the national level, your PTA membership perks include: Hertz, AARP, Sylvan Learning, Teen Safe, and more. Read about them all at http://www.pta.org/benefits.