6. Time To Go Home and Rethink Your Life
I guess when they hired a teacher to teach 6th-grade math, it didn’t really matter if the teachers themselves knew math beyond what was needed. Unfortunately, that now puts them in a situation where a particularly clever or curious kid asked a question they had no answer to.

That, or they thought it was too complicated to explain this soon. By 6th grade though, they really should have been prepared. Math is funky when you get into the negatives, but the rules are clear and make it easier to follow.