Qatar Canadian School follows the Alberta Curriculum.  They've had issues with staffing/turnover in the past, don't know if that has been resolved.  The children have to be bussed to the College of North Atlantic for outdoor sports and swimming as the school doesn't have such facilities.

Doha College is generally considered to be one of the best (and best facilities) it follows the American Curriculum - however, they usually have a very long waiting list and acceptance can also be contingent on your passport or where the parent(s) work.