This document discusses effective questioning techniques for instructors. It presents a taxonomy that categorizes questions as either high or low order and convergent or divergent. High order questions require deeper thinking while divergent questions have open-ended answers. Research shows that most teacher questions are low-level convergent, focusing on recall. The document outlines techniques for crafting higher-order, divergent questions like wait time and probing responses. When these techniques are used, students provide more thoughtful answers and teachers ask a greater variety of questions.