I have only ever worked in my present middle school so have nothing to compare with.
We have a new TA who says she didn't do half the things she has to do now, when she was in her old school. She's not complaining, she enjoys it, it was more an observation really.
For example, I go from lesson to lesson supporting different children with various needs, I deliver Read, Write Inc daily to a group of 12, I cover lessons occasionally, run guided reading groups, run a spelling group, mentor various children and run a social skills group.
I don't know any different, so wondered what other TA's get up to?!