A hacking competition for high schoolers... right before most finals weeks. I think this is a great idea, but the timing is nonideal.
As far as I know, most high schools in the United States end in mid-June, not mid-May.
This is actually perfect timing for US upperclassmen - this is the week after the AP tests, when many classes lessen the workload. Many schools I talked with about picoctf didn't do it because of its timing.