Blackboard (Faculty) - Grade Center: Drop Lowest or Highest Grade
This document provides an overview of dropping the lowest or the highest grade.
Dropping the lowest or the highest grade(s) can be done in either a Calculated Column or a Weighted Column.
Assign a Category
If you are dropping the lowest grade of a series of, for example, quizzes, all of the quizzes must be assigned the same category.
Create a Calculated or Weighted Column
If you have not already done so, create a Calculated Column (Total or Weighted Column)
- Create a Total Column
The Totals Column is included in your Grade Center by default in all new courses. It is set to display all columns in the Grade Center within its calculation.
Edit a Total Column
- To edit a Total Column, click on the menu drop-down button, then click on Edit Column Information from the expanded menu.
- From the Select Columns section, "All Grade Columns" is defaulted. If you do not wish to include all columns, click the Selected Columns and Categories button.
- Highlight the columns to be included in the Total column. To select more than one column, hold the CTRL key down while clicking on the column's name.
- Click the right arrow to move the columns to the "Selected Columns" box.
- Highlight the categories to be included in the Total column. To select
more than one column, hold the CTRL key down while clicking on the categories' name.
- Click the right arrow to move the categories to the "Selected Columns" box.
- "Calculate as Running Total" button should remain as Yes.
- Click Submit at the bottom of the page.
- Create a Weighted Column
The Weighted Total column should be used when the final grade is to be calculated by averaging the grade for items and/or categories and then multiplying that by a percentage for weighting. See Configure Weighting section below.
NOTE: If you are using the weighted total column as your final grade, you need to set it as the external grade.
Weighted Grades: Things to Know Before You Begin
- You can weight by column, by category, or by a combination of both.
- In order to weight by category:
- Relevant categories must first exist or be created (Full Grade Center > Manage > Categories) in the Grade Center.
- Individual assessments must be assigned to the correct category (Full Grade Center > Manage > Column Organization > select columns > Change Category to…).
- When you want to drop the lowest "x" scores for a group of assessments (e.g. quizzes), you must weight that group of assessments by category, not by column.
- The Weighted Total is always calculated as a percentage.
- The only way to apply Extra Credit or Attendance Demerit points with a Weighted Total is to apply that Extra Credit or Attendance Demerit column to a category.
- When you weight by category, you will be faced with an option to weight the individual items within the category "Equally" or "Proportionally" (see below). If all of the individual items within the category are worth the same number of points, it doesn't matter which option you choose. However, if the individual items within the category are worth differing numbers of points, the method you choose can result in dramatically different calculations. To determine which method is best for you, consider how you would manually calculate the score.
- If you would add all of the individual scores up and divide that sum by the total points possible, you should choose "Proportionally."
- If you would calculate the percentage earned for each assessment and then divide the sum of those percentages by the number of assessments, you should choose "Equally."
- For assessments being submitted through Blackboard, where a column will automatically be created each time you create a new assessment (e.g. Test, Assignment, Turnitin Assignment, or Discussion Board, Journal, Blog, Wiki set up to be graded) and you expect to have multiple assessments of that type, it is most expedient to weight by category. Each time you add a new item, as long as it is assigned to the correct category, it will automatically be included in the weighted total score calculation with the appropriate weighting.
- When you are weighting grades, you should not display the Total column to your students as it is irrelevant. Follow this path to not show the Total column to your students: Full Grade Center > Total > Edit Column Information > 4. Options: Show this Column to Students > No).
To configure weighting:
- Within a course, from the Control Panel, click on Grade Center and then Full Grade Center.
- Locate the Weighted Total column. Mouse over the Weighted Total column header and click on the menu expand the options beneath it. Select Edit Column Information.
- In Section 3, click on the appropriate assessments within the boxes under Columns to Select and/or categories under Categories to Select on the left to select them. Then move them to the Selected Columns box on the right using the arrows between the columns. Make certain that your choices do not result in duplication of data. For example, make sure you have not selected both a "Column: Quiz Average" and a "Category: Quiz" which would pull the quiz assessments in twice.
- As you move items to the right, you will be presented with additional fields to further define how the weighting is to be applied.
- For Columns, assign the percentage weighting for each Column in the box that appears before it. (See Figure A below).
For Categories, assign the percentage weighting for each Category in the box that appears before it. Choose whether you wish to weight the individual items within that category Equally or Proportionally (See Figure B below).
If you wish to drop the lowest "x" grades, enter that number in the appropriate field. The Total Weight must add up to 100%. You may need to click outside the box after entering the last percentage to see that last entry reflected in the total.
- Leave the Calculate as running total set to the default, Yes.
- Review the remaining settings in Section 4.
- Click the Submit button.
How Blackboard Calculates Weighted Grades
To better understand weighted grades, it is important to understand how Blackboard does the math.
Weighted Columns vs. Weighted Categories
Weight by columns when each assessment has a weight
Exam 1 = 20%
Exam 2 = 30%
Paper = 40 %
Participation = 10%
Weight by categories if you have multiple assessments of the same type
Quizzes = 20% (10 weekly quizzes)
Written Assignment = 40% (2 written assignments)
Tests = 40% (3 tests)
Weighted Equally vs. Weighted Proportionally
Weighting Equally is the sum of percentages earned divided by the number of items.
Weighted Proportionally is the total points earned divided by the total points possible.
For the example below, the points possible for each assessment are:
Quiz 1 = 20 points
Quiz 2 = 15 points
Quiz 3 = 25 points
Quiz 4 = 10 points
Quiz 5 = 30 points
Discussion = 10 points
Midterm = 100 points
Final = 100 points
For the example below the weights are:
Quizzes = 20 %
Discussion = 10 %
Midterm = 30 %
Final = 40 %
For the following example below, the Grading Schema is:
A = 90% - 100%
B = 80% - 89.999%
C = 70% - 79.999%
D = 60% - 69.999%
F = 59.999% and below
Selecting the correct type of column is important. Choose the method by how you would hand calculate the grade. Understand that the method you choose can affect the student's final grade.
For AAStudent #1, Total Points will give the student an A, but Weighting Equally and Proportionally will give the student a B.
For AAStudent #2, Weighting Proportionally will give the student a B but Weighted Equally or by Total Points will give the student a C.
For AAStudent #3, Total Points is the difference between failing the class or passing the class if weighted Equally or Proportionally.
Total Points is the fairest method and the easiest for the students to understand.
Drop Lowest or Highest Grade(s)
NOTE: For a "Total" column, in the Select Column section, click the radio button for Selected Columns and Categories to expand the section.
In the Select Column section:
- Move the necessary Categories over to the "Selected Columns" box.
- The "Drop Grades" radio button should be selected by default. If it is not, select the radio button.
- Add the number of grades to be dropped in the "Drop" box for either Highest Grade or Lowest Grade.
- Continue with the rest of the settings.
- Click Submit at the bottom of the page.