Don't let a grade decide your self-worth. Personally, in my opinion, someone should gauge their self-worth on what they've accomplished that makes them feel good... not in the hedonist aspect, but in the sense of personal accomplishment, as far as what they've accomplished for them, as far as their self-development and creativity is concerned.
It's great to want to be part of something, but it's a different thing completely to believe wholly in some type of movement, and to give everything for that something.
There are five known gyres spinning around in our world's oceans. A gyre is a slowly moving spiral of currents created by a high pressure system of air currents. A spinning soup, so to speak, is made of what exists in the water. And in this case, the gyres are spinning with millions of tons of our discarded and forgotten about plastic waste!