I only realised in retrospect that I got my first nugget in meta-cognition from Frank Skinner. A few years ago he spoke about getting old and one of the ways he keeps his brain as active as possible is by imposing a rule of only Googling things he doesn't know, and not what he doesn't remember. This is essentially the practice of memory retrieval, a vital skill for our students. I spoke about this at TM Newham hosted by Jonny Walker at Elmhurst Primary on Thursday 3rd November 2016.
Here is my presentation: