This document provides an overview of quizzes in Massive Open Online Courses (MOOCs). It discusses the key aspects of MOOC quizzes, including the different types of quizzes, assessment methods, and tools/services used to deliver quizzes. Quizzes are an important element for evaluating learner knowledge and providing feedback. They can be graded or non-graded, independent or embedded in videos. Assessment is typically automated but may involve self-assessment or peer assessment. Common authoring tools and services help support quizzes in MOOCs.