Exam statistics: change from boxplot to a stacked bar chart
Boxplots don't work well for binary score distributions, and even for more complex problems they may not represent the quirks of the distribution:
Stacked bar chart, where color is the score, on the other hand, should work better in cases of simple distributions, but still work well for continuous ones like the total score:
Here y-axis is percentile and color is the normalized score.