一次富有启发性的教学实验

As a chemistry lecturer, I was never quite sure how much course material my students were truly absorbing, so I decided to embark on an experiment. At the end of one lecture, I gave each student an index card to write on. Then, I listed on the board the key topics I had covered and asked the class to copy them onto the cards and write green, yellow, or red next to each topic. Green meant “I understand this well,” yellow told me “I am somewhat unsure,” and red indicated a more dire problem: “I am confused or lost.” I wasn’t sure how the approach would work. …