In 2004, it was reported that 47% of servers in schools were GNU/Linux but only 3% of PCs were running GNU/Linux. In the face of that Tiger Leap resolved:
“Tiger Leap Foundation has decided that all future software projects supported by them must be released under the terms of GPL (for source code) and Creative Commons (for learning content)”
see Open source software in Estonian schools – Hans Põldoja (2005)
Now, Tiger Leap will implement a Grades 1 to 12 computer programming strand in schools starting with a pilot. While the emphasis is on FLOSS they seem to be ecumenical on OS by using web applications heavily.