A few months ago I posted a PDF of what a school in Christchurch, UK had done with SharePoint which included making their own webparts.
I met up with the guys from Twynham and it was a great meeting which also include the representatives from Shirelands.
I had a email from Dave at Twynham the other day to say he has made some videos of the use of SharePoint in the school and has published them on the internet.
These are great thing to look at if your looking at implementing SharePoint are you school.