SEP consists of one two-week session in mid-July, during which students reside in the university dormitories and eat in campus dining halls, supervised by camp counselors assigned to each grade. The students choose four classes which they attend every day from Monday to Friday. After class, they participate in a wide variety of fun activities provided by the counselors, from sports to crafts. On the weekend in residence, special activities are planned for Saturday, with guest teachers and sometimes special guest presenters. Sunday is a day off for rest and relaxation. On the final Friday, parents are invited to visit the SEP Showcase, an afternoon of demonstrations, displays and performances in which the students share their projects and accomplishments with their friends and family. Thousands of students, from most American states and many foreign countries, have attended SEP.