Some Pre- and Post-Test Data from the CC Cert Course

Two versions of this study

The first time we analyzed these pre- and post-course test results was in December of 2020: here are those results as of December 2020.

More recently, in January of 2022, we collected all the available data — including the data which was in the first analysis of December 2020 — and now have a report of the results as of January 2022.