Its the learning part buddy
IMHO, its the learning process with linux, that a student undergoes, makes it worthwhile for schools to adopt linux. I believe you shouldn't be providing commercial support to schools, and let the students "learn" what linux and the open source is all about. The first hand experience and exposure to Linux that they have at such an early stage will only prepare them for thier future.
As a small initiative, the ILUG-BOM have started a small initiative to bring students into the Open Source world, by allowing them do their projects based on Linux, with the LUG members acting as "mentors". For those interested, the project is hosted at thefreespeech.org
As for as technicalities of Linux, I don't think any organization, let alone schools, have a better option.