There are several tutoring resources for Stanford students available during the academic year:
The Stanford University Mathematical Organization (SUMO) offers free twice-weekly tutoring sessions during the academic year for students in Math 51, 52, and 53. See the SUMO website tutoring page for more information.
The Office of the Vice Provost for Teaching and Learning (VPTL) offers free drop-in and individual appointment tutoring in the following Math courses: Math 19, 20, 21, 51, 52, 53. Tutoring for other Math courses may be available as well. To view the drop-in schedule and to view information about tutoring for other courses, visit tutoring.stanford.edu. To schedule an individual appointment, visit sututor.stanford.edu.