New Grading Scheme Type Supporting Numeric Grading Standards Worldwide

Idea created by Jaap Stelpstra on Jan 24, 2019
    Open for Voting
    Score48

    This idea involves creating a new grading scheme type, the Min-Max numeric grading scheme, to support numeric grading schemes worldwide without any rounding errors. Also the GPA scale can be facilitated with this idea, also without any rounding errors.

    Context

    The current grading scheme method originates from the need to translate assignment points to a text based grading standard such as A to F. This translation is done by defining ranges of percentages of points for each letter grade. The same method is used for the GPA grading scheme (0.0 tot 4.0).

     

    The problem using a collection of ranges to match a numeric grading standard is unnecessary rounding errors.

    Canvas grading scheme ranges

     

    To minimize the rounding errors a 0.0 to 10.0 scale needs 101 ranges to be defined:

    to

    (these ranges have a margin of 1%)

     

    The big question is, why not eliminate the ranges entirely for number bases grades (even GPA?) and have a direct calculation from points to the the numeric grade:

    Canvas grading scheme continuous

     

    Numeric grading standards worldwide

    Just to name a few:

    • 0 (low) to 6 (high)
      • Switzerland
    • 0 (low) to 10 (high)
      • Greece
      • Spain
      • Mexico
    • 0 (low) to 20 (high)
      • Belgium
      • France
      • Portugal
    • 7 (low) to 5 (high)
      • Germany (universities)
    • 1 (low) to 5 (high)
      • Croatia
      • Hungary
      • Kosovo
      • Portugal
      • Turkey
    • 1 (low) to 6 (high)
      • Poland
    • 1 (low) to 9 (high)
      • UK
    • 1 (low) to 10 (high)
      • Albania
      • Italy
      • Latvia
      • Lithuania
      • Moldova
      • Netherlands
      • Romania
    • 1 (low) to 12 (high)
      • Ukraine
    • 2 (low) to 5 (high)
      • Russia
    • 2 (low) to 6 (high)
      • Bulgaria
    • 5 (low) to 10 (high)
      • Bosnia
      • Macedonia
      • Serbia
      • Slovenia
    • 5 (low) to 1 (high)
      • Austria
      • Slovakia

    (source: Grading systems by country - Wikipedia)

     

    The design of the Min-Max numeric grading scheme

    The new Min-Max numeric grading scheme works without ranges, but supports the direct and precise calculation from points to the grade of the selected grading standard. The Min-Max numeric grading scheme applies to the individual assignments (see How do I add a grading scheme to an assignment?) and also to the course level (see How do I add a grading scheme in a course?).

     

    Creating a new Min-Max numeric grading scheme (mock-up)

    Selecting the Min-Max numeric grading scheme in the assignment settings:

    Min-max numeric grading scheme selection

    Selecting the Min-Max numeric grading scheme:

    Min-max numeric grading scheme view link

    Creating / editing the Min-Max numeric grading scheme:

    Min-max numeric grading scheme config

     

    Capabilities and properties of the Min-Max numeric grading scheme

    • Ability to define the range by setting a minimum value (low) and a maximum value (high).
      Examples:
      • 5 (min/low) to 10 (max/high)
      • 5 (min/low) to 1 (max/high)
      • 1 (min/low) to 10 (max/high)
    • Have it accept decimals behind the decimal separator with the options:
      • Setting a limit for the amount of decimals
      • Display of decimals:
        • Automatic
          (e.g. with 2 as limit, entering 7.00 or 7 will show as 7 and entering 6.35 will show 6.35)
        • Fixed amount
          (e.g. with 1 as limit, entering 7 or 7.00 will show as 7.0 and entering 6.35 will show 6.4)
    • Checkbox Limit grade when exceeding total points to keep the grade within the Min and Max.
      (e.g. while grading and more points are given than the total amount of points of the assignment, thus more than 100% of the total points)
    • Use precise rounding methods
      (e.g. when using weighted assignment groups or when using it as course grading scheme)
      • Offer a help text via the question mark icon at Display grade as

       

      Calculation method

      If Min < Max  Then

           Student grade = Min + ( Absolute ( Max – Min ) / Total points * Scored points )

      Else

           Student grade = Min – ( Absolute ( Max – Min ) / Total points * Scored points )

      End if

      Display grade = format ( Student grade ; desired decimal count )

       

      Examples

      Canvas grading scheme examples

       

      Simulation of the Min-Max numeric grading scheme

      In the attached Excel sheet you can experiment with the Min-Max numeric grading scheme, by:

      • Setting the assignment points
      • Scored points
      • Amount of decimals
      • Variations in numeric grading standards
      • Seeing the effects of the calculations