Initial Gradebook Setup

Gradebook Overview 

 

   

 Categories 

 Weights 

 Moving Items 

 Grade Scale 

 Aggregations 

 Moodle allows you to aggregate your grades in different ways, depending on how you want your grades calculated.  There is a detailed list of aggregation strategies accompanied by the examples and the mathematics used to calculate grades.  Whether an instructor employs the Moodle grade book or not, having a clear understanding of exactly how a grade is calculated is essential to assigning grades.   Moodle allows for granular control of categories and weights in aggregating grades.  Moodle's documentation goes into detail.  

 Moodle Grade Aggregation 

 

 Example Calculations 

 

 

 

 

   

 

 

 Raw Scores 

 

 

 Normalized Score 

 

 

 

 

 Assign 1 

 

 

 75/100 

 

 

 .75 

 

 

 

 

 Assign 2 

 

 

 35/50 

 

 

 .70 

 

 

 

 

 Assign 3 

 

 

 10/10 

 

 

 1 

 

 

 

 

 Assign 4 

 

 

 85/100 

 

 

 .85 

 

 

 

 

 All raw scores are first normalized to a value between 0 and 1: 

 
 Mean of Grades 
 

 Simple average of normalized grades: 

 

   

 Simple Weighted Mean 

 Normalized grade multiplied by weight, divided by sum of weights: 

 

 This is equivalent to: 

 

 Natural 

 If the weights are not adjusted, the default weight for each item is the maximum points possible, and the calculations are identical to Simple Weighted Mean. Natural aggregation allows for weights to be overridden. 

   

 Weighted Mean 

 Sample Grades 

 

 

 

 

 Category 

 

 

 Percentage 

 

 

 Weight 

 

 

 Category Subtotal 

 

 

 

 

 Daily Work 

 

 

 90% 

 

 

 30% 

 

 

 .90 * 30 =   27 

 

 

 

 

 Participation 

 

 

 25% 

 

 

 10% 

 

 

 .25 * 10 = 2.5 

 

 

 

 

 Tests 

 

 

 75% 

 

 

 50% 

 

 

 .75 * 50 = 37.5 

 

 

 

 

 Final 

 

 

 65% 

 

 

 10% 

 

 

 .65 * 10 = 6.5 

 

 

 

 

   

 First, Moodle calculates the percentage score in each category.  You may select whichever aggregation method you prefer for each category.  Categories may have different aggregation methods, which may be different from the overall aggregation method. 

 Final Calculation: 

 

 The calculation may seem redundant because the weights add up to 100.  Moodle does not require that weights add up to 100 in this method: 

   

 

 

 

 

 Category 

 

 

 Percentage 

 

 

 Weight 

 

 

 Category Subtotal 

 

 

 

 

 Daily Work 

 

 

 90% 

 

 

 1 

 

 

 .90 * 1 = .9 

 

 

 

 

 Participation 

 

 

 25% 

 

 

 1 

 

 

 .25 * 1 = .25 

 

 

 

 

 Tests 

 

 

 75% 

 

 

 3 

 

 

 .75 * 3 = 2.25 

 

 

 

 

 Final 

 

 

 65% 

 

 

 2 

 

 

 .65 * 10 = 1.3 

 

 

 

 

 

 (Note:  there was no attempt to use equivalent weights between the two examples)