here is a table of roughly who is available when.

UPPER CASE = public, open office hours
lower case = private tutoring

DIS: David I Schartz
TKY: Thomas K Yan
SNA: Sergei N Artemov
AMH: Amanda M Holland-Minkley
DF:  Daisy Fan
RR:  Raju Rohde
PH:  Prasanth Hande
EH:  Eric Hsieh
AL:  Andrew Lee
YL:  Yi Qun Liu
DW:  David Welte
WY:  Woong Yoon 

         Mon     |    Tue    |   Wed     |    Thu    |    Fri    
 9:30 -----------+-----------+-----------+-----------+-----------
                 |           |       df  |           |           
10:00 -----------+-----------+-----------+-----------+-----------
                 |           |       df  |           |           
10:30 -----------+-----------+-----------+-----------+-----------
                 |    yl     |           |  yl       |           
11:00 -----------+-----------+-----------+-----------+-----------
                 |           |   amh     |           |           
11:30 -----------+-----------+-----------+-----------+-----------
                 |    yl     |   amh     |  yl       |           
12:00 -----------+----  -----+-----------+--  -------+-----------
                 |    wy     |           |  WY       |           
12:30 -----------+----  -----+-----------+--  -------+-----------
                 |    wy     |           |  WY       |           
 1:00 -----------+----  -----+-----------+--  -------+-----------
                 |           |   SNA     |       DW  |           
 1:30 -----------+-----------+-----------+-----------+-----------
                 |    eh     |   SNA     |       DW  |           
 2:00 -----------+-----------+-----------+-----------+-----------
         EH      |    eh     |   RR      |       dw  |    TKY    
 2:30 -----------+-----------+-----------+-----------+-----------
         EH  YL  |           |   RR      |  AMH  dw  |    TKY    
 3:00 -----------+-----------+-----------+-----------+-----------
         DIS YL  |           |   DIS     |  AMH  PH  |    DIS    
 3:30 -----------+-----------+-----------+-----------+-----------
         DIS     |           |   DIS DF  |       PH  |    DIS    
 4:00 -----------+-----------+-----------+-----------+-----------
         DIS al  |           |   DIS DF  |       ph  |    DIS    
 4:30 -----------+-----------+-----------+-----------+-----------
         DIS al  |           |   DIS AL  |       ph  |    DIS    
 5:00 -----------+-----------+-----------+-----------+-----------
                 |           |   sna AL  |           |           
 5:30 -----------+-----------+-----------+-----------+-----------
                 |           |   sna     | rr        |           
 6:00 -----------+-----------+-----------+-  --------+-----------
                 |           |           | rr        |           
 6:30 -----------+-----------+-----------+-  --------+-----------