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 2018-2019 is:
| Block I | Aug 28–Oct 12 | Lectures |
| October 22-26 | Exams | |
| Block II | Oct 29-Dec 10 | Lectures |
| Dec 17-21 | Exams | |
| Dec 24-Jan 4 | Christmas Holidays | |
| Block III | Jan 7-Feb 15 | Lectures |
| Feb 25-Mar 1 | Exams | |
| Block IV | Mar 5-Apr 15 | Lectures |
| Apr 23-26 | Exams | |
| Block V | Apr 29-May 3 | Spring Break |
| May 6-July 12 | Lectures and Exams |
