Many educational resources from the BBC - separated by level. Although with a "British" twist for vocabulary, well worth checking out. The "questionnaut" on the KS2 Bitesize page is quite different than typical US review games.
professional development and student activities for a variety of science topics - if you need a refresher before teaching this is a good resource. Also lots of simulations are available. Requires sign in but does not require NSTA membership and many are free. Can save to My Library
Are all young people digital natives? Many older folks may well be digital immigrants but is there a marked difference in their abilities from digital natives?