Hi, Louisa, I'm glad to see you're back with us!  

The "official" wireless installation that's in the works is supposed to also upgrade the Ethernet switches in the classroom Concentrator Boxes, which might resuscitate some of the nonfunctioning network jacks in the raceways.  Meanwhile, that sort of shuffling cables that you mention, tedious as it is, remains a very practical solution.   -- But if you see a case of that where everything could be simplified by throwing a mini-switch (hub) into the mess, don't hesitate to suggest it.  

Cheers,

  ==Mitch