If Dad had a radio office, then Junior had to have a radio schoolroom -- or at least an "opti-onic" one and with four tubes at that. It looks more like a radar set to warn of approaching proctors, but maybe that's just me.
This 1943 advertisement is a bit hazy on the details, but apparently opti-onics provides the student of tomorrow with a gadget on his desk that records "all that goes on in the classroom... visually and audibly". If memory serves me correctly, the sort of things that go on in the average classroom don't really welcome being recorded either visually or audibly and I suspect that if future schoolboys learn anything, it will be how to cunningly sabotage these little evidence gatherers down to the last of their four tubes.
And remember to buy war bonds.