I have made a rubric. There are 7 categories. For each category the student can get 5, 4, 3, 2, or 1 point(s). Normally a rubric total score is converted from a raw score (x/35 in my example) to a final score (%). For example, a student who loses one point in each category would have a raw score of (28/35). Being right below the top possible score (35/35: A+) would still indicate rather good achievement. I would be likely to give the student an (B or a B+). However it seems that the system would automatically give 80%. A Student with straight 3s in the 7 categories would then have a failing score (21/35 = 60%) A failing score for the middle of the rubric criteria seems wrong- Straight 1s yes... straight 3s... no.

Am I doing something wrong? Is there a way to have the rubric properly convert the scores... I always believed that rubrics were preferable BECAUSE they look at skill ranges.

Thanks!

Amy Pryhocki,

Welcome to the confusing world of Rubrics.

Actually, it's not the rubrics that are confusing, the math behind them is extremely well defined. You add up the points awarded for each category and divide by the number of points possible.

The key to doing what you want is to understand the mapping between the rubric points and your grading scale. You need to modify your points to reflect the percentages that you want to award -- or you need to use the rubric for marking but not for scoring and then manually enter your own score.

When you say the points for each category are 5, 4, 3, 2, or 1, what you need to do is divide them by the possible 5 points to get 100%, 80%, 60%, 40%, and 20%. So, when you click the middle column, what you're doing numerically is assigning a 60% to that category.

What you need to do is start with the percentages you think each category should be worth and then convert that into a point value by multiplying by 5. So, if you think the middle grade should be a 75%, then you would need to make it worth 0.75*5=3.75 points out of the 5.

The alternative is to go ahead and use 5, 4, 3, 2, 1 but do not check the box to "use the rubric for assignment grading". You are free to mark the items as you wish to illustrate where the student falls and to provide them with feedback, but then you need to determine the grades manually based on what you think the student should get.

If you want SpeedGrader to automatically put in the score for you based on what you mark in the rubric then you need to weight the choices in the rubric to reflect the percentages each level is worth.

Doing things this way also allows you to weight certain categories as more. Let's say that category 1 is worth twice as much as category 2. Then for category 1, you make the possible points 10 instead of 5 and that 75% for the middle item would be a 0.75*10=7.5.

You do not have to use integers for the rubric point values, but each item must be unique. That is, you cannot put two levels with the same value (the 2nd and 3rd values can't both be 7).