Scholarship / The Global UGRAD Program is for young leaders committed to serving their home communities [3]

I believe that you had better not use contractions like ''didn't''. Instead, just write did not. Be aware of splitting multiple simple sentences by a comma before "AND".

Scholarship / Productive high-school years - UWC scholarship essay [3]

I think you did not focus on the main goal of how you are going to contribute to UWC. Try to be as unique as you can and mention something that can render you stand out among the crowds.