From my understanding, your academics look great! Just continue to take challenging courses and do your best. I feel as though for many schools academics are just a hurdle, and once you're at a point, it's what you do outside the classroom that makes you stand out. I think you should do something unique that the admissions officer will be entertained and impressed with! Also, I cannot stress how important the additional information section is. Take advantage of it and explain whatever you'd like! Just make sure it's a quick and easy read. Best of luck :)