Well, you have participated or facilitated an iEARN project and you feel proud of your students' achievements. Why not share your joy with your colleagues and the world? One way to do this is to write a Success Story for the iEARN website, but you also can send it to a local newspaper or professional magazine.
First of all, your Sucess Story must be hmm... a story! It is not a report you would send to grant agencies or education boards. It is meant to be read by other teachers just like you, so that they could be inspired by what you did and, perhaps, start their own project or join an existing one, maybe even yours. Make your story visual by adding some pictures of your classroom or student work!