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 2017-2018 is:

Block I Sep 3–Oct 19 Lectures
October 22-26 Exams
Block II Oct 29-Dec 14 Lectures
Dec 17-21 Exams
Dec 24-Jan 4 Christmas Holidays
Block III Jan 7-Feb 22 Lectures
Feb 25-Mar 1 Exams
Block IV Mar 4-Apr 19 Lectures
Apr 23-26 Exams
 Block V Apr 29-May 3 Spring Break
May 6-July 12 Lectures and Exams