I disagree with who says that it is no different than linkedin.
It hits a completely different niche with a different goal. Linkedin exists mainly to highlight work experience and academic background, with the goal to connect job seekers to employers (and the opposite). This seeks to connect high schoolers with mentors.
I think it is a pretty good idea and I also really like the design.
The question I have is: Is part of your goal also to connect college admission officers with students? Or students to advertise college admissions their achievements via your website?