Current Teaching (Fall 2021):
Math 104a: Introduction to Topology - Course website coming soon! 
Math 221b, Topics in Topology: Hyperbolic groups - Course website coming soon!

Past Teaching:
At Columbia:
Math UN1201(Fall 2020) - The main website for the course is Courseworks.  You will need to log in with your UNI in order to access the course content.
Math UN1201 (Spring 2020) - Click here for the course website

At UC Berkeley:
Math 113 (Spring 2018) - Click here for the course website.
Math H54 (Fall 2017) - Click here for the course website.
​Math 113 (Fall 2017) - Click here for the course website.

At UW Madison:
Math 222 (Fall 2015) - Click here for course website.
Math 234 (Spring 2015) - Click here for course website.
Math 234 (Fall 2014) - Click here for course website.
Math 132 (Spring 2013-Spring 2014)
Math 221 (Fall 2012)