"To put it this way, in the classes that I taught last academic year, the class average between those two classes compared to the previous time I taught these classes, was a full letter grade increase on average. I rewrote maybe ten questions on each [test] and it was just integrating the Packback questions into the new version, but the structure [and] the content was the same. I chose questions that related to the content of previous exam questions that I replaced, and overall they did a full letter grade better than in previous semesters. It was to the point that I thought, ‘Am I making this class too easy?’ But then, after going back through the Packback questions I realized, no, the rigor is the same, it’s just that having this additional tool to promote student engagement and for them to see how all these pieces come together, they’re really learning this stuff."