## Mini guides for teachers

Gradebook mini guide^{}

Under construction...

What is grade *Aggregation*?

The *Aggregation* method of a category determines how the grade is calculated:

*Mean of grades*- Grade items are of equal weight*Weighted mean of grades*- Weights of grade items can be adjusted*Simple weighted mean of grades*- Weight of each grade item is its maximum grade less its minimum grade*Median of grades*- The middle grade (or average of middle two grades)*Lowest grade**Highest grade**Mode of grades*- The grade that occurs the most frequently*Natural*- Maximum grade is the sum of the maximum grades of the grade items. Weights of grade items can be adjusted

1. In the first three methods listed above, the category grade is a percentage

2. The

*Simple weighted mean of grades*and

*Natural*methods support

*Extra credit*

3. The

*Natural*method is somewhat non-intuitive when weights are used and the grades do not add up to 10 or 100.

As an example, suppose that there are four items in a category with maximum grades of 1, 2, 3 and 4, respectively.

Suppose the student scores the maximum grade in the first two items and zero in the last two.

His grade for the category is:

Mean of grades | 50% | |

Simple weighted mean of grades | 30% | |

Median of grades | 0.5 | |

Lowest grade | 1 | |

Highest grade | 2 | |

Mode of grades | 0 | |

Natural | 3/10 | |

If, in addition, he has extra credit of one point: | ||

Simple weighted mean of grades | 40% | |

Natural | 4/10 | |

If the grades are weighted 4, 3, 2 and 1 respectively: | ||

Weighted mean of grades | 70% | |

Natural (weights adjusted) | 7/10 |

*top*and

*bottom*of the

*Gradebook setup*for a course with most of the above categories and the

*top*and

*bottom*of the

*Single view*for the student.