Inquiry-Based Math, Summer Numeracy Program

Measurement with catapults

As a team building exercise to finish the first week at Summer Math Camp, our Mathletes created simple catapults designed to launch cotton balls. The full description for the catapult design and construction can be found at this Kids Activities blog post.

Each student created their own catapult from the following materials:

  • 7 craft sticks
  • 3 elastics
  • Egg carton piece (single egg portion)
  • Cotton ball
  • Glue

We let the students experiment with how to construct their individual catapults, and provided guidance to those who needed it. The general construction resembled the exemplar below, although some students made adaptations as they saw fit. After testing out their creations, we all traveled down to the gym where students worked in pairs to measure the distance traveled (or height attained) for their cotton ball catapults.

For younger students, it provided the opportunity to practice:

  • Measuring distance/ height
  • Recording numbers in a chart
  • Comparing distances/heights

For the older students, they worked on:

  • Adapting catapult design to achieve greater distance/height
  • Adding up the total distance/height achieved over multiple trials
  • Estimating an average distance/height over a certain number of trials (for more advanced students)

We consolidated this activity by posing questions such as:

  • What was your longest cotton ball launch?
  • What was your shortest?
  • How could you have modified your catapult to launch the cotton ball further/higher?
  • Are there differences in the catapult designs that make some better at launching cotton balls further, and some better at launching cotton balls higher?

It was amazing to see how engaged the students were during this rich learning task. There were certain students who had been dead-set against anything resembling traditional math throughout the first week; yet even these students were eagerly measuring, adding, and comparing distances for their catapult cotton ball launches. Another great testament to the power of hands-on learning!

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