And if they say it's all going to be mobile, and you won't need ICT Suites, secretly plan for all that to fail, so you can easily retrofit a room as an ICT suite.
3) Discuss with the SLT what their 'vision' is for IT in the school. Do you need an ICT suite, or are you going mobile with laptops? Do you need wireless access throughout the building, or only in certain areas? How is printing going to work, are they going to be wireless/wired, in set locations around the communcal areas, or in classrooms?
Yeah, you need at least 10 data points in every room, and 2 WAPs in some.
5) Lastly, don't be afraid of speaking up. I don't know how long you've worked in the school, but if it's anything more than a few months is highly likely that when it comes to the IT infrastucture you know what is needed better than anyone else, including the so-called "experts" who will come along and try to pursuade you that you need 4 data points in every classroom, a WAP in every room, offices with 3 staff kitted out for 6, and massively expensive extras that you could probably do for half the cost they'll want, if they're even needed.