Tutorial Services offered by CFSS are free of charge and open to all ISU students currently enrolled. A combination of one-on-one and small group tutorials are offered for many courses. Some courses are tutored by appointment, while other courses math, for example) lend themselves better to a walk-in type system. Tutoring may be long-term, short-term, or single visit, depending upon the needs of the student. Students are tutored on a first come, first served basis throughout the semester. Approximately 40 tutors are employed each semester to provide services to over 1,000 students per year.