The difference being that in a classroom the 20 kids are all performing the same task at a time. Not the same as 3 kids at the same table all doing different th

The difference being that in a classroom the 20 kids are all performing the same task at a time. Not the same as 3 kids at the same table all doing different things- one could be taking a math test, another playing the trombone while the third is doing jumping jacks.