The problem with edtech evangelism is that it assumes the most valuable lessons are learned from other people’s success. This is why our lives fill up with stories of exciting tools that have transformed this that or the other thing. Exhausting, really. Given the importance of failure to innovation, it’s interestingly rare to find blogs, lists, journals, or conferences focused on failure, in any field. The Ten Most Awful Mistakes in Online Course Design.  Ten Tools I’ll Never Try Again. …