STEM Lesson


Lesson - Educational Innovations Blog

Looking for a STEM lesson?  With all the free lessons available online, it’s not easy to determine which ones are worth your time.  Unless you spend hours in front of your computer, how can you tell if the lesson is designed by a credible, experienced educator?  Never fear!  We’ve found some of the best free STEM lesson sources.

Please let us know in the comments section below if you find other worthwhile STEM lessons online.  Enjoy!

 

Read the rest of this entry »


Centripetally Yours


donna_giachettiBy:  Donna Giachetti

Around the EI offices lately, something magical has happening.  Folks are laughing more… There’s a lighter spring in their step and a happy-go-lucky chirp in their voices…  It’s as if we have all become enchanted.

Well, let me amend that…

EI employees are a very grown-up, responsible bunch.  They take pride in doing their jobs as well as humanly possible.  If you haven’t yet read Ted’s blog (EI’s Pick-and-Pack Customer Service Crew), don’t miss out!  It’s a paean to the hardest working group of individuals I have ever met.

Read the rest of this entry »


Building a Hovercraft Science Project


6769_100121036671012_100000193470961_521_4265928_nLook, Mom, No Wheels!  | Building a Hovercraft Science Project

by:  Norm Barstow

The first practical design of the hovercraft was completed in the late 1950’s by British engineer, Sir Christopher Cockerell.  Since then, the continued development of this invention has been ongoing, and currently, the hovercraft is being used commercially, by the military, and for personal use.  Teachers have been constructing versions of the hovercraft using balloons, film canisters and flat materials in classrooms for years.

The principle behind the hovercraft’s levitation is that when the air is released from the balloon, it hits the ground and rushes outward in all directions. The air flowing from the balloon through the holes forms a layer of air between the hovercraft and the table. This reduces the friction (the resistance that occurs when two object rub against each other) that would have existed if the hovercraft rested directly on the table. With less friction, your hovercraft scoots across the table.

Furthermore, extra air molecules are packed underneath the structure, which in turn increases the pressure under the hovercraft.  This increased pressure below the craft produces an overall upward pressure force on the craft therefore it supports its weight. Since air molecules are always leaking out from beneath the craft, you’ll need a source of air molecules to replace them, which is provided by the balloon.

Materials:Building a Hovercraft Science Project

·      Large plastic plate (not the inflexible type)
·      Foam meat tray from grocery store  (6.5” X 8.5”)
·      Old CD
·      Stiff cardboard

  • Poster putty such as Blue Tak, or Poster Tak
  • Smooth surface
  • Hole instrument: Ball point pen tip or hot nail or drill.

Read the rest of this entry »