I'm applying to some top schools (Ivy league, Stanford, Northwestern, Duke, etc.) from Canada. My school does not give out marks based on a 4-point scale, but instead gives out percentage marks (0-100). When I filled in the Common App, I didn't know what to put for the part where you self-report your GPA. I didn't know whether or not to average out my marks from Grade 9 - Grade 12, whether to leave out Grade 9, how to factor in the first term of Grade 12, etc. I just put 4.0 unweighted, even though my school doesn't use a 4 point scale.