'AA': (150, 'Your answer accepted as one of the best answers'),
'UV': (125, 'Your answer upvoted by instructor'),
'PP': (100, 'Practically perfect'),
'PR': (100, 'Practice question'),
'IA': (90, 'Incorrect or incomplete answer'),
'MU': (90, 'Missed quiz, made up by report later'),
'NW': (0, 'No work submited'),