‘18.090: Introduction to Mathematical Reasoning’

Table of contents

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

Course Info

Class Size 9
Hours/Week 8.0 (5 responses)
Instructors Bjorn Poonen
Overall Rating 6.6/7.0

Realistic Prerequisites

  • No prerequisites were necessary but some Calculus experience is helpful.

Course Staff

  • Very approachable. The professor was always available for consultations. Office hours were very helpful.


  • Most students believed that they learned the most from lecture and lecture notes.

Problem Sets

  • Problem sets were challenging but fair.
  • Some students attempted the problems on their own and then worked with peers.


  • There were a total of 6 quizzes, each under 30 minutes.
  • Quizzes were challenging but generally easier than problem sets.


  • The professor regularly uploaded very well organized lecture notes and lecture recordings.
  • A textbook supplemented class notes.


  • Final grade was majorly dependent on problem set grades.
  • Students found the grading to be very fair. Completion of all problem sets results in a passing grade.

Advice to Future Students

  1. “If you’re interested in math but scared about taking something more theoretical/proof-based or classes beyond 18.02/18.03/18.06, I highly recommend this class.”