School is not in session yet, in much of the country.
Colleges are unlikely, they don't capture the public psyche like smaller victims.
That sounds cold, but the calculus of terrorist acts is a cold math, indeed.
If the objective of these acts (provided they are in any way connected) is more gun control, the victims which will cause the greatest outpouring of emotion will be the target.
Dear Lord Jesus, keep the children safe.
I would fear to list the likely locations full of kids.
Too many “Gun Free” venues available for these wacko’s to attack.