Sales on educational materials or supplies related to wearables
I expect this to mostly be HumbleBundle listings, but if you know of any other sales on e-books, other materials, or even supplies, feel free to post them here.
To start, a new HumbleBundle was announced July 8 that covers a bunch of different types of programmable boards, including the Circuit Playground Express. View the bundle here. It'll be available for the next 2 weeks. HumbleBundle is an organization that offers e-books and games at a deep discount, with some of the proceeds going to charity. You can select how much of your purchase goes to charity vs. the platform vs. the publisher. I'm not affiliated with them in any way other than being a very satisfied customer. Anyway if you want to learn about tech stuff or if you're into graphic novels, you might want to subscribe to their mailing list; they have new bundles pretty regularly.