# Scenario: Final Calculated Grade Using Weighted System

You are teaching an introductory science course in which students are graded on four labs, their participation in discussion topics, and a final examination. You allow students to drop their lowest grade on a lab. You also provide bonus grades to students who act as moderators for discussion topics. If a student does not submit a lab, you leave it ungraded and treat ungraded items as a grade of 0.

You set up grade items and a Labs category with the following properties:

 Labs Lab 1 Lab 2 Lab 3 Lab 4 Discussions Moderator Exam Category Labs Labs Labs Labs Labs None None None Maximum points n/a 10 10 10 10 10 5 100 Weight 50% (for entire Labs category) 25% 25% 25% 25% Bonus n/a No No No No No Yes No Drop lowest 1

You assign the following grades for the student Frank Catcher:

 Labs Lab 1 Lab 2 Lab 3 Lab 4 Discussions Moderator Exam Frank Catcher n/a 0 8 0 7 8 3 71

You release the calculated final grade to Frank. It is calculated as follows:

 Grade item Calculation Lab 1 = Dropped Note: Dropped grade items are not included in calculations; grades are calculated as if the item does not exist. Lab 2 = 8/10*25/(25+25+25)*100 = 26.67% towards the category = 26.67*.5 = 13.33% towards the final grade Note: Lab 1 is worth 33.33% of the Labs category even though it is assigned a weight of 25%. This is because the lowest lab grade is dropped and there are only three labs contributing to the category. Lab 3 = 0/10*25/(25+25+25)*100 = 0% towards the category = 0*.5 = 0% towards the final grade See the note for Lab 1. Lab 4 = 7/10*25/(25+25+25)*100 = 23.33% towards the category = 23.33*.5 = 11.67% towards the final grade See the note for Lab 1. Discussions = 8/10*10 = 8% towards the final grade Moderator = 3/5*5 = 3% on top of the final grade Note: Bonus items are added to the final grade after other calculations. Do not include a bonus item’s weight in your total when balancing your gradebook. Exam = 71/100*40 = 28.4% towards the final grade Calculated Final Grade = 13.33+11.67+8+3+28.4 = 64.4%