User login

In Proportion

Source Institutions


Add to listGo to activity
In Proportion

Through this nutrition activity (page 5 of the PDF), learners will understand—and probably be surprised by—how big serving sizes of various foods should be. This is accomplished in a very interesting way: learners will practice estimating by comparing various foods to everyday objects, like a hockey puck and a computer mouse. This activity was created as a pre-visit for a traveling science show, but makes a great stand-alone activity as well! It is an excellent visual representation for learners to remember.

Quick Guide

Preparation Time:
10 to 30 minutes

Learning Time:
10 to 30 minutes

Estimated Materials Cost:
$5 - $10 per group of students

Age Range:
Ages 4 - 14

Resource Types:
Activity, Experiment/Lab Activity


Materials List (per group of students)

  • 1 matchbook
  • 1 tennis ball
  • 1 deck of cards or bar of soap
  • 1 blank compact disk
  • 4 dice
  • 1 computer mouse
  • 1 ping pong ball
  • 1 hockey puck


  • Life Sciences
    • Human Body
      • Health and Nutrition
  • Mathematics
    • Measurement
      • Units of Measurement
      • Size and Scale

Informal Categories

  • Food and Cooking


To use this activity, learners need to:

  • see

Learning styles supported:

  • Involves teamwork and communication skills
  • Uses STEM to solve real-world problems
  • Involves hands-on or lab activities


Includes alignment to state and/or national standards

This resource is part of:

Access Rights:

  • Free access


Source Collection:

  • COSI on Wheels Teacher Packs


  • All Rights Reserved, COSI Columbus, ©2009


User Lists

This resource is part of these lists: