18.900: Geometry and Topology in the Plane

Table of contents

  1. Course Info
  2. Realistic Prerequisites
  3. Subject Matter
  4. Course Staff
  5. Lectures
  6. Problem Sets
  7. Exams
  8. Resources
  9. Grading
  10. Advice to Future Students

Course Info

Class Size 26
Hours/Week 7.2 (11 responses)
Instructors Jeremy Hahn
Overall Rating 6.0/7.0

Realistic Prerequisites

  • Some students recommended knowledge in 18.01,18.02, and 18.06, but said this was not required.

Subject Matter

  • Students found the content interesting and found they developed good problem solving skills.

Course Staff

  • Students found the professor was approachable, supportive, and helpful.
  • The professor answered questions both in office hours and over email.


  • Students found lectures helpful, but found the textbook was just as beneficial.
  • Office hours and psets reinforced students’ learning.

Problem Sets

  • Students found the problem sets fun, challenging, and doable.
  • Students found problem sets took around 3 hours to complete.


  • Students found the 1st midterm fair, and the 2nd midterm lengthy and challenging.
  • Students found going over the exams in class to be helpful.


  • Students used Prof. Paul Seidel’s textbook, which they described as helpful and clear.


  • Students felt that grading was reasonable.
  • The grade breakdown was 60% psets, 10% for each Midterm, and 20% for the final exam.

Advice to Future Students

  1. “Great slower-paced, interesting math class! Would recommend”
  2. “Go to lecture!”