How do I suggest improvements to Treehouse?

Watching this video has given me the idea that one of the sections under the video should contain copies of each of the pieces of text that are pasted by the instructor during the video, that way students have an easier time emulating the instructors. I understand the value in typing out some of the things that instructors simply paste to save time, but my idea would not prevent students from doing that; it would just make it easier to follow along with the videos by providing some more resources to the student.

The bigger question that I have for the Discussion Forums is how can I submit my suggestions to Treehouse? I have seen a couple of forum posts along similar lines (suggestions for improved experiences), but I've never seen anything that clearly provides a channel to give constructive feedback and suggestions not related to specific issues or stumbling blocks, just to Treehouse UX.