What are the five most influential factors on student learning? (And, why?)

“1) Teachers as evaluators of their impact; 2) The power of moving from what students know now towards success criteria; 3) Errors are the essence of learning and they are to be welcomed as opportunities; 4) Feedback to teachers about their impact; and 5) The need for passion about, and promote the language of learning. Why—as these are the key findings, the story, underlying the 1200+ meta-analyses” (John Hattie, personal communication, July 24, 2016).