Not for groups, but for individual people. When I talk about topics of general interests for rationalists with someone else, I often introduce them to less wrong. I tell them something along the lines of "There's a community of like minded people who likes to discuss similar topics on LessWrong.com".

I think something similar, i.e. organic recommendations can work for larger groups, you just have to use a different format. One idea would be to give a presentation and then add a final slide recommending to check out the website.

I'm currently working on improving my math skills through khan academy.

Same. I am here right now. Looking at this at the same time.

Thanks. What skills in particular?

your waywo tag link is not working.

I'm currently working on improving my math skills through khan academy.

Edit: you need to add discussion before /tag

Good advice, I'm actually looking to start some similar projects. As you said feedback is very important, but for some of us it's difficult to find rationalists in our area to share these experiments. I would like to see some sort of online group where we can share and discuss practical ideas, or get advices from time to time. A forum would probably be enough, and I can create one if there's enough interest.