All regular TI courses are taught in blocks of eight weeks, with lectures during the first six (core courses) or seven weeks; the eighth week of each block typically serves as an exam week. In addition, first-year (core) courses have weekly one-hour classes, taught by a teaching assistant, in which students work on and discuss homework assignments.
The calendar for 2019-2020 is:
| Block I | Sep 2–Oct 18 | Lectures |
| Oct 21-25 | Exams | |
| Block II | Oct 28-Dec 13 | Lectures |
| Dec 16-20 | Exams | |
| Dec 23-Jan 3 | Christmas Holidays | |
| Block III | Jan 6-Feb 21 | Lectures |
| Feb 24-28 | Exams | |
| Block IV | Mar 2-Apr 17 | Lectures |
| Apr 20-24 | Exams | |
| Block V | Apr 27-May 1 | Spring Break |
| May 4-July 10 | Lectures and Exams |
