Seattle and the surrounding Puget Sound region have a large number of people passionate about CS education. Here are many groups you can connect with:
Sound CS Ed is a quarterly meetup of Puget Sound CS educators, education researchers, product designers, and non-profit organizers who are passionate about bringing educating every one in Puget Sound about the power of computing.
The Puget Sound CS Teachers Association brings together CS teachers from around the region to network and organize an annual programming contest.
Code.org, which is a national CS for All advocacy organization, is headquartered in downtown Seattle, and often holds events.