Just a few things to keep you reading, thinking, "mucking around", and while you're doing that you will have fun. For creative ideas, collaborative opportunities, communicating what's good, and critically assessing teaching and learning in the 21st century, start here and go to hundreds of other links.
Wonderful resource site ... no need to sign in ... just click and use. Content in vocabulary (a few languages), social studies (geography), science, and especially Math. Kids can be shown how to use it and go for it all by themselves. Easy to use!!