BTW. I did talk about this with my DS14 when he got home from school on Monday. Nothing was mentioned at school that day. (In CA so school was still going on.) His sister is in college in Boston so it's important news for him to know & he is 14 so we watched some of the news coverage together.

My point above is you don't know what is going on in a child's family and it's certainly not the place of a sub to know. In addition assuming that first or second grades watch the news so must already know is unprofessional.