Hi...My concept is an abstract logo. It's round/circular to represent your global outreach. It plays on the word "development" of your organization's name. In the center is a spiral element, which represents a scribble often associated when one is brainstorming on paper. Visually, it also brings everything together into one focal point or area (Pangea). The outer, blue colored element is used to represent the ocean, and add to the marks representation of earth.
This a more literal concept. First, the idea is to incorporate the use of a chalkboard-like background or element into your identity. The mark itself has a chalk-like stroke, and it's a book that open's it's pages to the world.