Eye Model Activity - free hands-on science activity for 4th grade elementary kids. Part of a complete unit on Body: Body, Senses, & the Brain. Meets Common Core and NGSS.
Stanford University puts its entire photography course online. You can follow all of the expert lessons for free.
Perfect art piece for your music room!
Homemade wind turbine basics for home owners. How to get started if you're thinking of creating your own wind power at home. http://netzeroguide.com/homemade-wind-turbine.html Box fan windmill. Make a wind...