Here are some really good links for freebies posted by Laurie Fleming at www.inspiringnhkids.com
Free Online Safety Education Kit available from NetSmartz.org
Teach kids how to be safe while using a computer. Includes videos, games, lesson plans and more. You can also order a kit (all free)
Recycling Rangers from Smart
Lessons about recycling, has bunch of free worksheets able to be downloaded, includes math, lots of interesting worksheets on measuring.
Free program, features programs on animals, including cats, dogs, elephants, ocean animals and more. Great lesson plans.
Lots of freebies, includes ideas for the month Lots of freebies available for free, you just need to create an account.
Online College level classes from Harvard to Stanford
Hundreds and hundreds of topics from art to geometry