The following websitess have some great resources that dealw/ a variety of Science topics and emphasize the use of hands-on learning activities...Enjoy!
MM
Metric Mania:
http://www.sciencespot.net
How to use a Triple Beambalance:
http://www.wisc-online.com/objects
http://www.ohaus.com/products/education/weblab
Countertop Chemistry:
http://www.science-house.org/learn/CountertopChem
