Common Sense Media: Graphite
However, not everyone knows about Common Sense Media's resource known as Graphite.
What is it?
Graphite is an ongoing catalog of the best websites, games, and apps in education. They rate both free and paid products.
Sounds good...anything else?
Quite a bit. One area of interest is Graphite's Common Core Explorer. This allows you to select specific common core standards (science is coming soon) and see apps, sites, or games that address those standards.