Please check the link of CANADA VISA
http://www.canadainternational.gc.ca/united_kingdom-royaume_uni/visas/forms_study-formulaires_etude.aspx?view=d
It clearly says to send Study Plan (copy from site):
Study plan: Please submit a one page study plan which answers the following questions and includes any other information relevant to the processing of your application:
Why do you wish to study in Canada in the program for which you have been accepted?
What is your overall educational goal?
Why are you not pursuing a similar program in your country of residence/citizenship?
What research have you done into studies in your country of residence/citizenship?
How will this program enhance your employment opportunities in your country of residence/citizenship?
What ties do you have to your country of residence/citizenship?
If it has been more than 2 years since you have left full-time education, please provide your C.V. (resumé).
In the case of a minor applicant, what are your reasons for studying in Canada? What is your parents’/guardians’ immigration status in their current country of residence?
Provide details of your education history – dates when the course started and ended, the name and address of the school, the course taken, qualification/degree/certificate awarded for the course
THANK YOU!