This study describes the first year of the yoga program in the Encinitas School District, in California. This program was the subject of a court case in which the school district was sued by a family for government sponsorship of religion. The judge ruled that though yoga has religious roots it was not religious in the way it was being taught in Encinitas. For more information, have a look at this article.

The study involved interviews with yoga instructors, teachers, principals, district leaders and parents, as well as stakeholder surveys, and other indicators. Although there were limitations in the study, the findings relating to well-being, behaviour and other school based outcomes are promising.
Corke 2014 Yoga in public schools in Encinitas