For lots more about Carisbrooke Grammar join the Isle of Wight Heritage Group on Facebook and search for “Carisbrooke Grammar”. This page is listed there thanks to Jason Smart.
Somewhere in that group I found a September 2017 video which explores the school during its demolition – Carisbrooke College is building an entirely new school on the site! The head says that “at last” they will have a building “fit for purpose”!
Check out Google Street View: their images are from 2011, pre the re-development of the site, and show the school more or less as I remember it. CLICK HERE to see Street View 2011 images on this website.