Do I have a shot at Stanford, U Penn, or another Ivy League school? Any advice to help improve my chances?

I am a junior in the state of Illinois.
GPA: 4.447 (I still have two semesters before apps so a potential 4.55 GPA)
Class Rank: 6th (again subject to change)
PROJECTED SAT (I have not taken it yet) – 2200+
Extracurriculars – Varsity Academic Bowl (JV MVP for 2 yrs)
- Model United Nations – Verbal Commendation at MUNI conf.
- Student Council Rep. a good chance of being the Sdudent Rep to the School Board next yr
- WYSE – Worldwide Youth in Science and Engineering
- Cross Country – Varsity and JV Levels
- Varsity Tennis
- Martial Artist – 10 years of involvement and currently a high purple belt, having won awards at the state level in my freshman year
– Penwasciz – Program at the local hospital – get to witness procedures,gain medical experience,assist patients, etc.
- 4 years of volunteering at the hospital – guest services rep
- Work Exp: Sears Cashier (3 mo.)
Additionally- Marquette Young Scholar Program – accepted and recieved an A,plan to attend Stanford Summer School

You won't know until you apply. A couple of suggestions: explain GPA scale; many schools use a 4-point scale. And how can you project a score on the SAT? Crystal ball? Finally, a small point, learn the difference between verbal and oral.