For our children who have difficulties interacting with others, it is even more important to keep providing safe, supervised opportunities to play with their friends. As our academic year winds down, our time spent "playing" at school will increase.
How will your child spend their summer? Try to provide as many opportunities for safe play with friends as structured camps and activities. Make sure you have phone numbers for all their friends before the year ends. Give their parents a call and see if you can arrange some time to "hang out" (intermediate students say they are too old for playdates!) The time you invest in helping your child connect with friends and providing discrete supervision will be repaid many times over.
Here are some links to additional reading on the merits of play.
An investigation of Unstructured Play in Nature - Starling