I was surprised to find this website and the many FREE resources that it offers for study of famous people, art, math, Bible, and grammar.  There are also links to interactive games for your students to reinforce their studies.  Definitely take a look at Garden of Praise to see these

BetterPhoto.com offers some articles and online courses for kids and teens who are interested in photography. This is a great thing for students to explore in the summer! Check out the link with your students, and let them learn something new without a school table being involved!

Looking for an art activity that incorporates science and also involves an essay contest?  National Geographic is sponsoring a contest for a student-created flag for their Ocean Now expedition ship.  Click here to go to the site for official rules.