Eliud Kipchoge runs marathon in 1:59:40.2

Eliud Kipchoge breaks 2 hour marathon barrier.

On October 12th, Eliud Kipchoge ran a marathon in Vienna in under 2 hours. He has now broken a barrier of what humans are capable of accomplishing.

We wondered how record marathon times have changed through the years.  Will those record times keep being broken?  Does the data help you predict?

The activity: FastestMarathon.pdf

Operation Gratitude – Halloween candy buy back

This is a great idea! Motivate kids to get rid of all of that candy for a good cause.

Operation Gratitude and dentists are encouraging healthy eating, motivated giving, and offering a good use for all of that leftover candy. Is this a good deal for kids?

Halloween activities (14)

How well can you predict your candy haul? - Students consider how to determine their best predictions of their candy haul.  The math ideas of measurement error and percent error are introduced.  Students then predict their own Halloween candy collection numbers and compare their predictions to their actual haul using measurement and percent error.

az_vampire_batVampire bats - We've found lots of interesting metric and customary unit facts about Vampire bats and asked students to relate those facts to measurements that they are familiar with.

How long will it take you to trick-or-treat?


It's Halloween and this is your neighborhood. How long will it take you to trick or treat at every house in your neighborhood?

Possible conversation with students:

  • How long will it take you to get from house to house? You should stay on the sidewalks. You may have to avoid landscaping and cars.
  • How long will it take you to get your candy at each house? (Other trick or treaters could be in your way.  You may have to wait for your friends.)
  • Are you better off going back and forth across the street or going up one side and then back down the other?

Collecting the most candy

Clicking on any of these images will show them larger in a new window.

Use your student’s Halloween enthusiasm to do a study on volumes.  We’ve created an activity that asks students to calculate the volume of candy containers that are silly and intriguing.  Skip the cone and the sphere to make this activity more useful for 5th or 6th graders or include the whole activity to challenge with a little bit of percent work.

We've also added a Halloween bucket volume for yet another challenge. bucket-pic.pdf