PBS
Pbs Teachers: Door Opener
Apply knowledge of simple machines to design on paper and then construct a device that will open a door from across the room.
Curated OER
Wikipedia: Natl Historic Landmarks in Massachusetts: Reginald A. Fessenden House
Reginald Fessenden (1866-1932) was an inventor who worked for a time in Thomas Edison's workshop. His most notable inventions made possible the transmission of audio sounds via radio waves, and included many other radio-related...