How should grades be calculated?

Teachers spend a lot of time thinking about how to fairly grade their students. And students spend a lot of time thinking about how their work will affect those grades. But how does a teacher’s choice of a grading system affect how students are assessed?

In this lesson, students use averages and weighted means to examine some different grading schemes and decide what other factors ought to be considered when teachers assign grades.

- Given a list of grades (as either percentages or raw scores), calculate the mean of a dataset
- Investigate how using a weighted mean affects a grading scheme
- Use computed averages to plot mean grade over time
- Discuss what factors or considerations should be included in a grading system