Your students can submit to the summer PoWs on their own. They can see the problem on the main FunPoW page and then click on the Submit link underneath the problem. The submissions process will ask them to identify their state from a pop-up menu and then their school. Schools are alphabetized by the name as given to us, so "The Chestnut Hill School", for instance, would be under "T".
If they have submitted before, they will find their name on the list that we show them on the next page. If not, they can add their name. They will need an email address to which we can send replies. We also ask for a parent or teacher email to approve their participation if they are under 13.