85mm 1.4 and D90....ISO really pushed.
This set up was pretty tight but i had room to move around.
In most cases the reach was a plus.
24mm 1.4 and D90
This was at the Wanch, not much room here.
A typical classroom is even bigger, wide prime is a must.
A 20mm 2 or 2.8 would do as well.