Linden Lab created a minor furor last year when they discontinued the 50% discount given to educational and non-profit institutions on private region purchase and ownership. A lot of educational sims disappeared from the grid as a result.
Now, LL has done an about-face and the educational discounts are back. The official announcement can be found here: http://community.secondlife.com/t5/Featured-News/Updated-Pricing-for-Educational-and-Nonprofit-Institutions/ba-p/2098039
Inara Pey beat me to this (she usually does, that woman is tied into everything and writes like lightning!) Read her take on it here: http://modemworld.wordpress.com/2013/07/24/return-of-50-discount-to-educational-non-profit-groups/
As a teacher, I applaud this move. I do think that it may be too little, too late -- a lot of the educational institutions that left Second Life are now set up on OpenSim grids. While OpenSim based grids are less content-rich than SL, they are also MUCH cheaper. In many cases, they are free. Still, it's a good move. Kudos, LL!