She asks the teacher, Mrs. Smitheimer, to require the students to participate in the study to pass the 5th grade. In her study, Cassidy plans to have the children run one mile three days a week, and track their height, weight, and body fat percentage over the course of the school year. The children will not be aware of the true purpose of her research; they are told that they are running a mile so frequently as a part of the new physical education curriculum.