4'th period needs to learn how to party

I would like to know what went on in second period.

4'th? Why the apostrophe?

Why is there a tally on near-death experiences? O_o

Are those burns burns or are they burns?

Near-Death experience

7th's got it goin on!

Seventh knows what's up

what i am wondering: why does is seem that 7th period has whipped out near death experiences??