I'm not actually teaching any more, but I am writing pieces for schools all the time, and for kids.
“You can't start worrying about what's going to happen. You get spastic enough worrying about what's happening now.”
“Thirdly, even if we assume that the world is governed by purpose, we need only add that this purpose - or, if there are several, at least one of them - is not especially intent on preventing suffering, whether it is indifferent to suffering or actually rejoices in it.”