Office hours



Monday

Tuesday

Wednesday

Thursday

Friday

10:30 - 11:30
Matthew Kendall
381-F
10:30 - 11:30
Matthew Kendall
381-F
10:30 - 11:30
Matthew Kendall
381-F
3:00- 5:00
Dor Elboim
382-E
12:00 - 1:00
Vaughan McDonald
381-D
12:30 - 1:30
Saehoon Eo
380-G
1:45 - 2:45
Wojciech Wieczorek
381E
2:30 - 4:30
Wojciech Wieczorek
381E
4:00 - 6:00
Vaughan McDonald
381-D
2:45 - 5:45
Joao Campos Vargas
380-G


7:00 - 9:00
Saehoon Eo
380-G


Peer Tutoring

The Stanford University Mathematics Organization (SUMO)works with the Stanford Math department to provide free drop-in tutoring services for Math 21. The tutors are Stanford undergraduates available to answer any questions you have about the material and homework in Math 21. Just show up and the tutors will help you out. Feel free to come and work on your homework there even if you don't have any specific questions. Many students work on their homework during tutoring, asking questions when they encounter difficulties.

Starting the second week of each quarter (on Sunday, January 11th), tutoring for Math 21 is


Winter 2026
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