Hi,
I wouldn't be surpurised if the first school was demolished. there are lots of flat roofs and those portakabins at the back which have a short shelf life. Which classroom can you remember being constructed, the one at the back nr the playgroup or the one at the front? I had long gone by the time the front one went up.
I've got a couple of interesting books. "Sandford", by Michael Blakeston (out of print) and one called "Wareham"(Ingenious names!), which i cant gey my hands on right now. they both have lots of pictures. Interestingly, Northmoor & Northport both get their names from the fact that the gates at the bottom of the steep hill going into Wareham was called the North Gate, or North Port. and the land beyond it was the North Moor.
Wareham pre-dates Poole and Bournemouth by some distance. Bournemouth was only made popular as a tourist attraction in the 1800s when it had TWO BIG stations. The rivers into Wareham made it a prosporus place.