. The three programs, YES (Your Extraordinary Saturday), ExplorSchool, and Expand Your Mind, each deal with a separate age group of students, and often share staff members and class styles. YES is for students in grades 1-4, and takes place on Saturdays during the school year. ExplorSchool is offered for students in grades 4-6, and it takes place during the summer, with classes being held Monday through Friday over a two-week period