The problem is that for many people, it's hard to organize their learning. They can't read every article. They might have been a member for a few months, or a year. they miss out on many of the pieces. If there are exercises in the articles, that's fine. We can re-use those, but I need a way to organize and put some of these together. I want to give people a set of problems they can work on to slowly improve their skills.