Although kids often relish summer as a time of lazy days and fun in the sun, education doesn’t have to take a back seat to barbecues and swimming excursions. In fact, it shouldn’t, especially since research has shown that students lose several months' worth of knowledge during the summer, says Alexandra Mayzler, founder of Thinking Caps Group, a New York-based tutoring company. Educational activities are easy to incorporate into everyday summer activities so students remain sharp and ready for the return to school.