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 2021-2022 is:
| Block I | Aug 30–Oct 16 | Lectures |
| Oct 18-22 | Exams | |
| Block II | Oct 25-Dec 10 | Lectures |
| Dec 13-17 | Exams | |
| Dec 20-31 | Christmas Holidays | |
| Block III | Jan 3-Feb 18 | Lectures |
| Feb 21-25 | Exams | |
| Block IV | Feb 28-Apr 15 | Lectures |
| Apr 18-22 | Exams | |
| Block V | Apr 25-29 | Spring Break |
| May 2-Jul 15 | Lectures and Exams |
