I believe LinkedIn works because for one if it's main use cases, there are two matching parts in the graph: 1. If you are looking for the next step in your career, we'll help you find it through search & recommendations 2. If you are trying to find the right candidate for your position, we'll help you find it through search & recommendations
Your use cases for students and teachers aren't like LinkedIn's - they aren't two sides of the same coin. How do the teachers make the Meritful better for the students like recruiters do for employees on LinkedIn?
Edit: Perhaps college recruiters? Generally they'll pay a lot to convince students to apply. They recoup it in application fees though :) You may also be able to charge parents of graduating seniors some kind of college search tools.
College admissions (especially the not top-50 colleges) spend a lot of money convincing students to come to their school. We hope to give them a very targeted avenue to reach out and recruit students. You're right...this is a really important issue.
So the idea was to create a platform where students can document and share their projects and activities in a rich way, while getting feedback from their peers and mentors---along the way building a professional network.