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 2020-2021 is:
| Block I | Aug 31–Oct 16 | Lectures |
| Oct 19-23 | Exams | |
| Block II | Oct 26-Dec 11 | Lectures |
| Dec 14-18 | Exams | |
| Dec 21-Jan 1 | Christmas Holidays | |
| Block III | Jan 4-Feb 19 | Lectures |
| Feb 22-26 | Exams | |
| Block IV | Mar 1-Apr 16 | Lectures |
| Apr 19-23 | Exams | |
| Block V | Apr 26-30 | Spring Break |
| May 3-July 16 | Lectures and Exams |
