Shared calendars in Outlook
I want to look into shared calendars for the staff at my school (11 - 16 high school, approx 100 staff). The idea would be that one central calendar could be created by the office, with things such as holidays, report deadlines, etc that apply to everyone and then this could be shared with all staff. If possible, I'd also like departments to be able to add their own little bits on, so perhaps the Head of Maths could add in something for other Maths teachers to see, but no one else would get this.
We already use Outlook and we have an Exchange 2003 server hosted internally. Could I do this? If so, are there any "getting started" guides anywhere?
If this is not possible with Exchange 2003, would an upgrade to Exchange 2010 do this? I've heard this mentioned by various people but I've been bitten before my spending money that's not needed. Is there any other solution?
Thanks for your help, I'm a teacher by the way (Subject Leader for ICT/Computing), not a techie!!