You might search the research on "TeachLive," which is a mixed reality, virtual teaching environment being used in various teacher education programs. There are a number of articles on the uses of TeachLive and they have their own conference based out of the University of Central Florida.  

Hello Susan

Here are the publications :

http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=8913117&fileId=S1092852900024196

http://www.waset.org/publications/4780

http://www.sciencedirect.com/science/article/pii/S0360131510001466

https://books.google.co.th/books?hl=en&lr=&id=W3IajVswsK0C&oi=fnd&pg=PR1&dq=virtual+reality+classrooms&ots=Ktnf50OwHk&sig=8ADU2S93XanA3X9iDy19qhvhbjc&redir_esc=y#v=onepage&q=virtual%20reality%20classrooms&f=false

Thanks for your quick response Ali - i appreciate your collegiality

Sue

pleasure Susan.