Cross Validated 

  Cross Validated  is a question-and-answer site dedicated to statistics and statistical computing. It is part of the completely awesome  Stack Exchange  network of Q/A sites which I rely on heavily when coding. The questions range from the fairly straightforward ( &#8220;How can a regression be significant yet all predictors be non-significant?&#8221; ) to the fairly complicated ( &#8220;What&#8217;s the difference between principal components analysis and multidimensional scaling?&#8221; ) to the fairly abstract ( &#8220;How are we defining &#8216;reproducible research&#8217;?&#8221; ).  

 There is a ton of interesting instruction being done there. I have heard others scoff at the idea of giving away your expertise for free on sites like these, but I think that Cross Validated and other sites are crucial and vibrant places for students to learn about statistical methods. And this is a chance to actually help people in a concrete way.  

 Also, check out their  community blog , which promises to have great little tidbits, mostly focused on R.