At Brown

Fall 2019: Math 241 (graduate algebraic topology).

Spring 2019: Math 25b. Main page here.

At Harvard

Fall 2018: Math 25a.  Main page here

Spring 2018: Math 25b (theoretical real analysis). Main page here

Fall 2017: Math 25a (theoretical linear algebra). Main page here

Spring 2017: Mapping class groups. (written) lecture notes

Fall 2016: Math 21a (multivariable calculus). Main course website. Some notes