My school has switched from weighted grades to unweighted grades. Is this okay?

Yes. Unweighted grades are fine. More than 5,000 secondary schools are represented in our applicant pool. Each one has its own approach to grades and/or ranking, and we studiously evaluate each individual applicant's transcript within the context of his/her own school setting. So, if your school weights your grades, we'll consider this as we review your transcript; if your school doesn't weight your grades, we'll be mindful of this as well. Neither approach is "better" or "worse" from our perspective. They are simply different. Even though your grades may appear to be lower within an unweighted grading system when compared to a weighted system, this is a moot point. Our focus is on your performance within your school context. I hope this helps.