Our courses are set up such that students must pass a quiz with a score of 80% or higher to progress on to the next unit. As a school, we provide our course material in this manner for all students, regardless of payment arrangements, for a few reasons. The material in the courses builds upon itself throughout the duration of each course. The quiz process helps to ensure that students develop a firm understanding of the material in the course to help support them in their success with the material and to hold them accountable as they work toward achieving their certificate of completion. It also encourages students to focus on each unit of the course one at a time, similar to a college course. I hope this gives you some clarity on why we structure the courses this way!