I've published a new course on Pluralsight titled Creating a Living Style Guide with Sass and Vanilla JavaScript. Using a real-world example, the course will guide you on thinking modularly about design and development by creating globals and components that are flexible and extensible.

I've got a course up on Pluralsight, on Responsive Web Design, directly in the browser. It's meant for those who wish to bypass the Photoshop/Sketch layer, and get some CSS chops without relying on frameworks like Bootstrap and Foundation.