Hello,
Following is the link of case study from @satisharalkar and Prasad Marathe on using ERPNext to educate concepts of ERP to their students. 
http://vedarths.com/blog/general/an-erp-overview-with-a-hands-on-experience-for-engineering-students
We would love to hear your story as well. The good ones could be broadcasted over erpnext.org as well. Some of the customer stories for your reference are here.