Do you think I can be valedictorian?

My school offers courses from the IB organization, and that has gotten at 13th out of 763 students. When school starts in the fall, I'll be a sophomore and I just want to know if you guys think I can make it to first by the end of senior year. I'm clear that to be a valedictorian, you have to participate in several/many extra curricular activities and must also have a good attitude. Based on your experiences, I hope you can help me.