The bell curve means, by definition, that some non zero amount of people will not cluster around the mean. This is where the notion of personalized learning re

The bell curve means, by definition, that some non zero amount of people will not cluster around the mean. This is where the notion of personalized learning really comes into place. (https://en.wikipedia.org/wiki/Personalized_learning https://en.wikipedia.org/wiki/Personalized_learning)