With the increase in online teaching sessions, instructors face the need to engage and challenge their students in new ways. Online quiz sites provide teachers with a cost-free means of gaining immediate feedback on their students' progress. However, students can become bored if multiple-choice quizzes do not vary and are used too often. This article describes a simple means of writing multiple-choice questions--which most often comprise a stem (the question) and four answer choices--to make them more engaging and challenging for learners of all levels and teaching contexts, online or off-line.