Thanks for this. The responses they've come up with so far are particularly useful. I'm certainly finding it difficult to argue against my friends at the educational ICT errr, well, business unit I guess. I did use a substantial amount of the points that were raised to argue against them and failed miserably because they kept waffling on about the 'bigger picture'.
Tell them the bigger picture is Global IT. That is what governs standards not what the DfES says let alone one LA. The overwheming Global trend is a shift away from proprietary products to open systems and open standards based on the Internet, W3C etc. Even office file formats are moving to XML and many web based office apps are springing up Google Apps for example. These are tending to support ISO 26300 the XML based office standard. MS is having great difficulty getting its OOXML standard to ISO ratification despite chucking hundreds of millions at it. Look at the take up of Moodle globally and its growth rate (stats on Moodle web site) show me any other VLE that has this global take up and growth. That is what decides standards, not ignorant ill-informed IT officials. Look at the social networking sites where kids learn from each other (some bad as well as good) If you want to prepare students for the future and this is what education is about, give them experience of Web based apps and safe social networking because that is where it is all moving. The desktop is likely to become less and less important so basing a long term IT strategy on a single desktop operating system and its vertical lock in to proprietary network applications is sheer folly. Get them to read some of Prof. Clay Christensen of Harvard Business Schools work - eg "Seeing what is next". Its not IT specific but it explains why what is popular now is not a good guide to what is going to happen in the future. That is understanding the bigger picture. The LA is a small insignificant player in this.
However, at the end of the day the only person I have to justify myself to is the headteacher and then to sincerely hope that she listens to me over them.
Explain things in terms of learning and why you are preparing students for the technological future they are moving into. In the end they are already doing it. They will have their own accounts on You Tube, My Space etc. We have to educate them about the dangers and benefits of these rather than feeling obligated to support particular commercial technological interests and the fact that the LA IT staff are 10 years out of date. Open Source software is a growing and important part of that future not just because of the technology but because of the collaborative communities working to support the technologies they all use. These communities arise from the internet and they enable greater scope for students to participate in the development of their own learning resources too. This is the way in which government policies such as the personalised learning agenda can be made to work. You are ahead of the game so being forced to conform to mediocrity by the LA is not good for the school and will limit the childrens learning opportunities in the longer term. Your school is above average in its IT vision don't let it regress, support excellence!