So, you’re getting ready for High School (or are perhaps already there) and don’t really understand what a Carnegie unit is. Effectively it’s a point system where you have to earn a specified amount by taking classes as part of the requirements to graduate. Most students don’t start earning these until they are actually in high school when they take their first set of required courses. It is possible, though, that you can begin earning them in middle school.
In Gwinnett county, there are 5 courses a student can take as an 8th grader that have the potential to earn these units. Be careful, though, as the grade you make in that course can carry over in to your high school GPA. As an 8th grader, though, you do have the option to decline the Carnegie unit. It won’t kill any chances you have when earning those credits in high school. It will make sure your grade stays as a middle school grade. The advantage to earning units in middle school is to get a jump start on your high school graduation requirements.
So, a Carnegie unit is a point that you earn when you pass a class successfully. To find out how many are required, check with your county school board. They are generally posted to their web site. In Gwinnett county, you can find the graduation/promotion requirements here.