On April 18th, John Hattie (Visible Learning) spoke in Toronto.  During his presentation, participants shared resources and links on twitter (#HattieTO).  A compilation of these tweets can be found here.

For those who were unable to attend either the April 18th presentation or the presentation that followed at OISE on the 19th, oakbellUK has made a couple of videos of John Hattie available that you may find interesting:

Part 1: Disasters and below average methods

and

Part 2: Effective methods

Twitter user @kstef2 has also provided an interesting approach to sharing tweets using Storify for the #HattieTO tweets