Professor Varvarezos's 120A feels like a lower-division class, in both material learned and also easiness. I did not learn much from this class as I would have wanted about differential geometry besides computations and brushing up on differentiation and picturing three-dimensional spaces, since that was primarily the highest dimension that we studied. He spent much of class getting caught up in the details of differentiating functions, which is beneficial for most of the mathematics of teaching majors but was not the most helpful use of time to me, a pure math major. I would have appreciated more of generalization to higher-dimensional spaces or more topics in the vast field of differential geometry.