Day 39: Exam 1

Exam 1 box plot

As I was grading this years Exam 1 in my concurrent enrollment college level physics class I had a feeling that students were really rocking it compared to last year, so naturally I spent 1-2 hours on a Saturday night playing with the data. This box plot is, I think, the best representation, showing that all four quartiles increased. This is verified in that the mean had a statistically significant increase (p<0.05) and the standard deviation decreased from around 13 to 9.

I am in the process of writing a blog post about why I believe this increase of scores occurred, so you’ll have to wait a bit for that. The teaser is that it’s a kind of Standards Based Grading (SBG) implementation for a class in which I can’t really do SBG.

Here is a more dynamic graph that gives the values of the quartiles.

UPDATE: Here’s the blog post, When You Can’t Do SBG

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One Comment on “Day 39: Exam 1”

  1. […] attribute the gains I saw in this and the first exam to implementation of modeling instruction last year and a modified version of Standards Based […]


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