Here are a few (optional) sources for science material and programs shared by Dr. Peter Bartanen and by teachers who have received grants. If you have additional resources to share, please send them to balszfound@gmail.com.
Science on Wheels (Arizona Science Center)
Engineering is Elementary Kits (Boston Museum of Science)
Hummingbird kits: http://www.hummingbirdkit.com/ (robotics kits)
LEGO Mindstorms (the “gold standard” of robotics kits for 4-8): http://www.lego.com/en-us/mindstorms/?domainredir=mindstorms.lego.com
Lab-Aids: http://www.lab-aids.com (these say they’re for middle school but would be good for 4th and up with teacher assistance)
Delta Kits (K-8): http://delta-education.com/science/dsm/index.shtml
Little Bits Electronics for Education http://littlebits.cc/education
Vernier: http://www.vernier.com – digital data collection, probes, and lesson manuals
http://www.carolina.com/ They sell all types of material (this is where I bought microscope supplies), but they also have free downloadable lesson plans.
International Society for Technology in Education Articles
Seven Stem Tools You Can Use for Any Subject (ISTE)