[–] banjo 4 points (+4|-0)

From the "questions for the class" list:

What do you like about being the gender you are? What do you dislike? Why?

If they focused on this one they might have some fruitful discussions!

[–] Srfthrowaway 1 points (+1|-0)

When my sister was in like grade 4 or smth her class had an assignment where they had a list of activities and interests, and they had to pick the ones they liked.

Then the truth was revealed: Each one of those things was considered either male or female.

The kids' minds were blown that you could like stuff that was supposedly the opposite sex.

Lesson being (surprising at Catholic school) that anyone can like any activity or interest.

That was a very long time ago.