Hi Leah!
If you are a Jamaican citizen studying in Canada you can return to Jamaica as long as when you return you have:
•a valid passport or travel document
•a valid study permit if you are returning to study in Canada and
•a valid temporary resident visa
If you are a citizen of another country in order to enter jamaica I am unsure of what you would require but the same would apply when returning to Canada.
You can find further info at http://www.cic.gc.ca/english/study/study-arriving.asp