Calculating Percentages and Weighted Averages

How do teachers calculate test averages? Viewers learn how to calculate test averages in the fifth installment of an 11-part Math in Science video series. The video consider different situations and grading schemes to calculate weighted and unweighted test averages.

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Instructional Ideas

  • Provide learners with their test scores to calculate their average
  • Use the video as an intervention tool for those struggling with percentages and weighted averages
Classroom Considerations

  • Video assumes viewers can already convert percents to decimals
Pros

  • Video gives a simple, straightforward explanation of the process
Cons

  • In the point system example, the easiest — and probably most often used method — is to add up all points and divide by the total possible points, which is not the method shown in the video