Learning Circles are highly interactive, project-based partnerships among a small number of schools located throughout the world. There are two sessions each year, September-January and January-May. To join iEARN Learning Circles, you must first be a member of iEARN and complete an iEARN Learning Circle placement form two weeks before the beginning of the session. Once you complete the placement form you will be placed in a circle for the next session.
http://www.iearn.org/circles/circle_slideshow/learning_Circlesptt.htm