Don't let students fall behind and suffer from summer "brain drain". Build a fun class for them to keep them busy learning!
PhET Simulations - all ages science and math
ThingLink - use your own image and have kids explore for information
Symbaloo - instead of listing URLs, build a tile board with fun images
Don't forget that having your kids make their own lessons and teach each other is a great way to keep students engaged and learning!!
Feel free to add more in the question and answer section below!