Finland's Centre for Practise as Research in Theatre has published the English version of its guide Social Circus – A Guide to Good Practices.
Available to download [PDF] from the Sosiaalinen Sirkus website, the guide's an extensive handbook that covers everything from setting up a social circus project through to running classes and bringing in instructors. There's also a Circus Toolkit that offers some template class structures and management ideas, plus an Appendix with information on significant social circus projects around the world.