This document outlines Linda B. Nilson's top 10 best and worst teaching practices. The best practices include setting clear learning outcomes, giving students practice to reinforce learning, providing feedback, communicating high expectations, integrating challenges into learning, and getting mid-semester student feedback. The worst practices include presuming student knowledge or interest without assessing it, using technology to replace in-class activities, rewarding all student responses equally, and failing to enforce classroom conduct rules.