A new issue of The Montana Mathematics Enthusiast has just appeared. This issue – Number 3, 2011 – is a special issue on “Optimizing Student Understanding in Mathematics”. The articles in this issue are a selection of some interesting papers from last year’s PME-NA conference. More about the background for this can be read in Professor Bharath Sriraman‘s excellent editorial. As usual, all articles in TMME are freely available as pdf-downloads, just as I like it 🙂