NetTutor is an online tutoring service provided by CMU as a supplement to on-site tutoring available through the Center for Learning and Teaching. It is available with no extra fee to any current CMU student for assistance with their coursework.
The Fayette Campus Center for Learning and Teaching on the 1st floor of Cupples Hall offers Academic Counselors, Tutors, Learning Communities, Study Rooms and other services to assist your learning needs. You can visit their homepage here for a full list of services and tutoring hours.
Here is a brief video on how to use the NetTutor service.