Thursday, November 22, 2007

Levers La La La: A Science Learning Song to Teach about Levers and Simple Machines

Preparing to teach Benny's Lego League team about levers, I realized that I myself knew nothing about levers. I vaguely recalled that a crowbar is one, and that force times distance equals knit one purl two Francis Bacon. Beyond that, I was in the dark. When I was 18, I took a class called University Physics, where these things were probably discussed. OR maybe not. The people in my class may have all been well beyond the study of simple machines. Maybe I was too, at the time.

What I chiefly remember about University Physics was that I was in the middle of trying to get my school to boycott table grapes and thereby save the world from injustice. I'm pretty sure I missed a few labs and maybe even the final. I got an A the first semester, a B the second semester, and from there things got really bad and I ended up an English major. I'm sure my physics professor wanted to crack my head like a nut on several occasions. I was a terrible student. Really terrible in an epic, timeless way. Rotten. At the time, calculus was giving me hives.

Anyway, now that I have two bright young students on my roster and am no longer so completely absorbed in electric guitars and oppressed peoples, I went to the library and learned about levers. And, because I am me, I wrote a song about it to teach this info to the children.

Here is a link to a PDF of the song sheet lyrics:

Here are the lyrics:


In a first class lever, the fulcrum is between
The force and the mighty load
Which might be water or a kid named Jean
You use a first class lever to paddle a canoe
A seesaw or a scissors or the
Shoehorn in your shoe

Your load is so heavy and your fulcrum is fixed
If I apply some force today
We can lever all your troubles away

That's not all the levers we've got
Let's give the second class lever a shot

In a second class lever the force is at one end
The fulcrum's at the other end
The load is in the middle but the bar won't bend
A door is a second class lever, and a wheelbarrow's one too
If you like to use a nutcracker
Try lever number two!


That's not all the levers we've got
Let's give the third class lever a shot

In a third class lever it's the fulcrum, then the force
Then the load on the other side
Which might be an apple or a stick or a horse
Your arms are third class levers, your legs are levers too
And shovels, slings, and spoons
When you use them to fling food.


And here is a video of the Legodiles (plus one extra little brother) singing the lever song:

Here's my chance to publicly apologize to Dr. Fulcher for being a rotten student. Homeschooling a seven-year-old is a perfect chance to start over on physics, and this time I'm paying attention.

Interested in more Little Blue Ideas? Try the Idea Box for homeschooling ideas and more.


  1. awesome... I linked it to my free home ed blog!

  2. Anonymous4:20 AM

    Cute song - I noticed the beginning of the song said you use a first class lever to paddle a canoe. Its actually a third class lever since the water is the resistance, and the fulcrum is the top hand.

  3. Actually it depends on what type of paddle you're using and how you hold your hands. You make a good point though!