CHECK THE DATA , ASSUMPTIONS NOT ENOUGH

I teach Primary 4, about Excel. I see Audrey's  work. I get impression that it is good. Smart. It's impression  of eye  fron  long distance. But when I check with detail, I find  that not just  as my assumptions. Audrey's  work not just  as  criteria that I need. "Oh, my God. Seldom sense lie us.  For valid   assessment to someone, we need  data  , assumptions not  enough.