I read the additional details you posted in the answer (they have been moved to the discussion area). I think the class load you are taking is challenging enough, and you should keep Psychology. Doubling up on tough classes might just stress you out, and you want to continue to do well. Geometry isn't that tough, if you want to get a head start on it over the summer... but in all seriousness, I think you should take the summer off and enjoy being a kid. Adulthood comes fast enough, and there is no reason to rush it. If you want or need to do something to add to your resume, find someplace to volunteer, or get a part-time job.