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Patricia NewmanPatricia Newman
Sibert Honor Children's Book Author & Environmentalist
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GinoBartali

LitLinks: When figuring out the answer to math problems means life or death

April 7, 2021 LitLinks, LitLinks-Grade 3-5, LitLinks-Grade 6-8 No Comments
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GUEST BLOGGER MEGAN HOYT


      Have you ever seen math problems like this on a standardized test and immediately felt your cheeks flush and your heart race?

A truck travels 110 miles in 2 hours. What is the average speed of the truck?

      Just reading that made my mind swirl!

     When I was young, I hated word problems with a purple passion because they held no meaning for me. Even now, I’m thinking, “I write picture books for children. Why do I need to understand higher level math?”

      In my book, Bartali’s Bicycle, I researched the life of Italian Tour de France winner, Gino Bartali. Gino had to make a huge life and death decision. In 1943, he was asked to deliver forged documents to members of the secret underground to save the lives of Jewish people being sent to concentration camps by the hundreds. These journeys would require speed and cunning as well as many delicate time calculations.

As Tour de France winner Gino Bartali cycled across Italy on “training rides,” soldiers waved, fans took his picture, and border police asked for his autograph. They never knew he was secretly working for the underground. He kept his remarkable story a secret, even after the war. To the entire world, Gino Bartali was a champion cyclist and nothing more. Only upon his death did his family uncover the truth—that he saved more than 800 men, women, and children from certain death, with a wave and a smile, a photo op and an autograph.

      NOW I was interested in word problems about speed and distance and time.

Breaking math problems into bite-sized pieces

      I hope children will be inspired by this high speed hero after reading Bartali’s Bicycle, but I also hope they will learn a smidge of higher level math. Here are a few concepts that I believe can be reduced to bite-sized chunks for upper elementary students.

First, introduce the following formula:

If:         Distance = Speed x Time

Then:   Time = Distance divided by Speed

And:     Speed = Distance divided by Time

These equations work just like any others do:

If 20 = 4 times 5,

then 4 = 20 divided by 5

and 5 = 20 divided by 4.

      Now, let’s go back to the original question:

      A truck travels 110 miles in 2 hours. What is the average speed of the truck?

      And turn it into something students will care about learning:

      Gino Bartali must deliver secret documents to the underground workers in Assisi, Italy. He needs to travel 110 miles in 2 hours. How fast must he pedal to get there in time?

Speed = Distance divided by Time.

So . . .

Speed = 110 miles (Distance) divided by 2 hours (Time)

110 miles divided by 2 hours  = 55 miles per hour

The answer?

Gino has to cycle at 55 miles per hour or he may arrive too late!

Here are a few hands-on, whole body activities for third grade and above that will help them understand these concepts a little more easily.

Activity 1: Hands-on TIME and SPEED math problems

Materials: a stopwatch, a yard stick, a remote control car, pencils, a roll of butcher paper, graph paper (regular paper will do)

  • Have a designated student use the stopwatch to time how long it takes for a remote control car to travel different distances.
  • Measure out a length of paper that is twelve feet long and tape it to the floor.
  • Place the car at the edge of the paper.
  • Place a ruler at various intervals along the length of paper to block/stop the car each time you measure its time, first at three feet, then six feet, nine feet, and twelve feet. Now you can measure how long it takes the car to travel to each place. Ready, set, go!
  • How long did the car take to reach the three feet mark? Six? Nine? Twelve?
  • Ask students to create a chart to record their measurements and complete the math problems below.                                                    
DistanceTime
3 feet
6 feet
9 feet
12 feet

And once you have the times and distances on the chart, you can even calculate the speed of the remote control car in feet per second. Remember Distance divided by Time equals Speed.

Distance (divided by)Time (equals) Speed
3 feet
6 feet
9 feet
12 feet

Activity 2: The SPEED of a foot race

How long does it take for a student to run from one end of the playground to the other?

Measure out fifty yards, grab a stopwatch, and go!

Since Speed = Distance divided by Time, you can find out how fast the student ran:

  • Distance: 50 yards
  • Divided by time:  (measured by stopwatch in seconds)
  • Equals: Speed (in yards per second)

“Il vecchio e il Tour, lo speciale dedicato a Gino Bartali su Rai 2” by CiclismoItalia is licensed under CC BY 2.0


Megan Hoyt first fell in love with reading on a cozy branch of the crabapple tree outside her Texas home. She devoured Beverly Cleary’s books there, and Marguerite Henry’s “horsey books” still remind her of the loud Texas cicadas at dusk.

Her debut picture book biography, Bartali’s Bicycle, is coming out in early 2021 with Harper Collins Children’s Books’ new imprint, Quill Tree Books. O
ne of her poems, “Thanksgiving by the Lake,” appears in the Millbrook Press anthology Thanku: Poems of Gratitude (2019), and her graded reader, Clara O’Hara, Private Eye (TCM) is available now. Her first picture book, Hildegard’s Gift, came out in 2014. www.meganhoyt.net @meganhoytwrites


Click for more LITLINKS STEM + Literacy activities

Tags: STEM+LiteracySTEM+Literacy Physical Science
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