Sum up [insert subject] in 5 words or less

[Kakariko Kid]

More like:
Nothing important is taught here.

Actually, I think it's more like

School:  You don't care, won't learn.  Inversely: If you care, you'll learn.
Edit:  Even easier way to sum up school:  You get what you give.

But, I still don't know how to file taxes.

That's why my wife files ours. I used Turbo Tax once.