A large crop picture next to the town of Blaesheim is reportedly a “geometry exercise”, planned and laid out by by a Strasbourg math teacher and two busloads of his students 

“This beautiful crop circle, inspired by a French garden, and which appeared in a wheat field at Blaesheim, is the work of college students of the school Jean-Sturm of Strasbourg, based on an idea by their math teacher.
 

Wishing to have them perform a life-size geometry-exercise, the teacher made contact with managers of GAEC Gloeckelsberg - none other than Jacques Baur, mayor of the town, and his brother Jean-Philippe - who gladly made the one of their fields available for the project.
 

On Monday, June 17, two coaches filled with schoolboys arrived in Blaesheim. Using ropes and stakes, they made these geometric figures, which caught the eye of an amateur aviator who flew over the area on Wednesday June 19.” 

LINK HERE