If a student retests, do you see "grading the results of both tests' average" as most effective to teach students the idea of "Trying hard the first-time matters?" If not, what would you recommend?

Not sure I completely understand this one … I would not average the two scores, but would emphasis the improvement, closeness to the success criteria, and record both as separate pieces of information” (John Hattie, personal communication, March 23, 2018).