This is a collection of quizzes for assessing your students’ understanding of how to convert units as a type of ratio reasoning. There are three quizzes – one for simple conversions, one for more complex conversions, and a combination quiz that includes both kinds. Actually, there are multiple variations, including shorter and longer versions tailored to your students’ needs. Many things that can be measured have different units, and those units exist in a ratio. For example, length can be mea