Students spend much of elementary school learning to read and then the rest of their lives reading to learn. Typically, students are assessed with a reading inventory several times a year during elementary school starting as early as kindergarten. Although reading inventories can vary between schools and districts, regularly assessing the reading level for students and the inventory used allows educators to track progress and modify instruction throughout the school year. Moreover, reading inventories are some of the earliest formal assessments given to students. They can provide invaluable and early insight into student learning. Learning to read is critical for success at all levels in the education continuum.