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All contests for grades 1/2 are free to write, as well as the first contest in October for all grades. For a small number of countries, participation is completely free. For grades 3/4 the fee is CAD 9.00 per student for the whole school year and for grades 5-12, the fee is CAD 15.00 per student for the whole school year. Alternatively, a school can purchase a school wide pass for CAD 280.00, which allows all students in all grade levels to write all contests that year. Prices are subject to 13% tax (HST). Schools can claim the HST back under our business name "Caribou Contests" and business number BN 834584237RC0001 and HST number 834584237RT0001.

Apart from contest participation other practise and learning material is available which does not require contest participation. Examples are detailed written solutions, previous years contests, online mini courses and a book about calcrostics. Please see the Online Shop for details.


If you want to participate this year, find out if your school is already participating in the contests. You can view all the schools that have downloaded access codes for this school year at the participating schools page. If your school is not in the list, ask your teacher if they would be willing to register with Caribou and administer the contests. If you are a home schooled student, please see the 'Home Schooling' note below. To participate in a library, ask the library staff to register and administer the contests. To participate at another school, look for * on the registered schools page, and ask if you can take part at their school.


For helpful information on how to get your child participating in the Caribou Contests, see the "Students" paragraph above. If you are home schooling your child, see the 'Home Schooling' note below.

If you need to sponsor your child yourself, you can pay online using PayPal © by using our Online Shop, and purchasing an access code or a school wide pass for your child's school or teacher.

If your child's school or teacher is not in the drop down list when selecting a teacher, then you should contact the teacher. They need to sign in and "Allow Third Party Payments", which they can do after they login on their 'Edit My Account' page. Once they set that option to on, the school will appear in the list. Once you pay for the access codes, your child's teacher will be emailed informing them of the purchase made.

Parents of children without school, without library or with a non-participating school can register their child by clicking 'Online Shop' and following instructions.

Home Schooling

If you are the organizer of home schooling, e.g. as a parent, and would like your students to participate, then first try to see that they participate through a school or library or other organization to avoid them writing a contest at home with parental supervision. Hints are given here under the header "How and where can my child participate?". If this does not work, or it is more expensive than the Caribou fee itself, then register yourself as a 'Contact' and perform all steps of contacts (teachers, librarians). When you register your home school as a contact, use the name it might have, or use the name "homeschool". It goes without saying that you will organize a fair contest participation and not help your students during the contest.

Contacts (Teachers, Librarians, Home School Organizers)

First, you must register (only once, not every year). Then, sign in and get student access codes (free or paid). For free access codes, you can use the Get Free/More Access Codes link available on your contact main menu, or in the left side menu of this page. Otherwise, you must purchase access codes using our Online Shop, which accepts payments by PayPal, credit card or by cheque.

If you pay for individual codes, then they are either automatically allocated, or you get credits (when it is not clear to our program whether the payment is used to purchase new codes or to convert free codes to paid codes). If you purchase a school wide pass, you have to manually request additional access codes using Get Free/More Access Codes, but you can get as many as you need and for all grades. In any case, afterwards you can use Display Access Codes to view the access codes you have online or to use payments to convert free codes for the October contest into paid codes valid for the whole year.

If you want to allow parents or others to pay for access codes, then sign in, click Edit my Account and check the option "Allow Third Party Payments". Then, your name will appear on the public list on the above pages, so parents will be able to purchase access codes for your students. Like all other codes you can view these codes by clicking Display Access Codes.

On a contest day, you will have to hand out the access codes to your students. If a student has not taken part in any contest this school year so far, give them an access code that has not been used before. Each student uses his/her own one code for the whole school year. Display Access Codes displays which access codes belong to which students. You do not have to input student names. They get attached to an access code automatically when a student participates for the first time in a school year. There is no other student registration.