1) The document describes a teaching practice called a "Minute Paper" used in a class on data structures in C. In this practice, students wrote short responses at the end of class answering questions about what they learned, remaining questions, and a one sentence summary.
2) The responses showed that students had 94-100% understanding of strings and string functions but only 65-86% on other topics.
3) Based on the feedback, the instructor was able to identify areas needing more explanation and examples to improve student understanding for the next class.