Grades are..... uh.... ok I don't really know how to describe it, but if you are 6 years old, you are usually in first grade. Grades usually rise as age does, reaching 8th grade when you hit.... 13? Yeah 13. 8th grade marks the end of elementary school, and 9th grade is when high school starts. Therefore, according to the first post on the CS template, your characters should between 11-14 years of age. That's how it is in the U.S., or at least in the schools I go to. It's up to Rethel whether these are accepted or not, of course.