Almost all schools arrange a for a summer camp during their holidays.
It's most common among Orthodox Jewish religious schools to own summer camps.
There are many camps for young people. Some are general summer camps others are dance summer schools. Contact local community workshops for summer camps. For Dance Summer schools contact the local ballet school, they generally know where they are.
There are many summer military schools available for your children. Being summer time many of these military schools are military summer camps. Here is a list from a reputable summer camp website: http://www.mysummercamps.com/camps/Special_Programs/Military_Camps/index.html
There are many kinds of teen summer camps. These include both specialized camps such as teen boot camps and also general summer camps.
There are some schools.
You need to specify the kind of camps: Boy Scout camps, summer camps, military training camps, concentration camps.
There are so many different summer camps for so many different interests. Check out www.teensummercamps.com for ideas and camps your son may be interested in near you.
The US has MANY Jewish summer camps.
Some of them do.
High schools are popular. So are sewers and summer camps.
Depending on what kind of summer camp you are looking for, and how old you are, the ost recongized summer camp are the music summer camps. THere are many summer camps that are free and fun.
There are no studies on the subject, but many schools do have it.