Is the exercise bank really free?
Yes. Every set is read directly on the site with the full worked solution on the same page, and every exercise can be checked on the page before the solution opens. Nothing to download, no email capture, no paywall, and no account needed to read anything. If a solution is worth writing it is worth showing.
Browse the bank → Are the exercises in English?
The McGill and Concordia courses that have a course page (COMP 202, PHYS 101, MATH 133, MATH 140, MATH 141 and Concordia MATH 203) have their sets and revision sheets written entirely in English, listed at the top of the exercise index and on the English revision sheets page. The rest of the bank is in French, because that is the program most of it was written for. Mathematics itself does not need translating, so a French set on integration by parts is perfectly usable in an English course.
English revision sheets → What does the free account keep, then?
The student's progress: exercises ticked as done, those flagged to review, sheets read, favourites, the points earned and the right answers of the self-checked exercises, which stay filled in when they come back to finish an exercise. The dashboard brings them back to the last set they opened and says which chapter to tackle next, computed from each chapter's prerequisites. A student can also note the date and chapters of a test or midterm and get a plan day by day, and every answer missed on the first try lands in a notebook of their own traps.
Create my free account → How do I create the account, and is there a password?
An email is enough. The student enters their address, receives a six-digit code and types it on the page: the account is created, or reopened if they already had one. No password, and nothing else is asked, no name, no school, no phone number. The code is valid for one hour; the same email also carries a button that opens the account on the device where it is read. A student under 14 asks a parent to create the account with the parent's address.
Create my free account → Can a parent follow their child's progress?
For a child under 14, the parent creates the account with their own address and adds one profile per child: each profile has its own dashboard, viewed one at a time. From age 14, students open their own account and decide what they show. The site creates no ranking and no public profile.
Do I need to be your student to use them?
No. The bank exists whether or not you ever contact me. Use it, share it with a classmate, work through it alone.
An exercise I need is missing. Can I ask for it?
Yes. At the bottom of every exercise set and revision sheet, the box “Something missing?” takes a type of exercise your teacher gives, a problem you are stuck on, or a mistake you spotted in a solution. I read every request. Sending one goes through a free account, an email and no password, because that is how you hear back: when the exercise is added, you get an email and see it on your dashboard. Nothing on the site needs an account to be read.
Create my free account → 
Le Tuteur Scientifique