Here is a double puzzle worksheet for those of you who are teaching at more advanced schools. When I made it, I didn't realize it would turn out to be too difficult for my students. But maybe it will work for some of yours. Second is a cryptogram which may be easier. It has the exact same key phrases but not as hard. Then there is a connect four game board. You can laminate it and make a set for each pair of students in the class. Then use white board markers for the students to mark their answers. This one focuses on answers in the future, not just for the summer. Students have to make a complete sentence. Have fun!