So how would you and your school implement a Computer Science course below A-level?
If your answer is that you would never implement such a course, then the RaspPi is obviously surplus to requirements. However if you do intend to implement such a course I would be interested to hear what hardware you were intending to use.
I am not sure what either of your are going on about, many schools run perfectly good computer science courses using virtual devices instead of having expensive hardware. Secondly the price of an HDMI to VGA adapter cable is less than £2.50, so nobody needs to buy newer monitors.
That £2.50 cable won't do what you suggest, it merely takes digital output from some graphic cards to display on an HDMI monitor. Down-converting HDMI to VGA requires
some actual data conversion and more than just a cable.
A lot of monitors are still sold with just VGA, it saves a few quid. Some at the lower end have VGA/DVI. The vast majority of our monitors at work are VGA, even the newly supplied ones.
Recently I have been buying monitors with HDMI, to get some sort of future proofing. I have old monitors which are still quite usable but they are VGA only, shame to just chuck 'em away.
Of course, HDMI is soon to become obsolete as well...