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In this activity, learners will predict the size of a giant scale model of a comb or other rectangular object, then make one. If you tripled the size of a dollar bill, could you sit on it? If you tripled the size of your notebook, could you lie down on it? Learners choose a rectangular object they think they could fit on if it were three times larger. They create a scale model of the object at three times the length and width. As a more challenging variation, they create a scale model ten times larger. [Activity is publicly available through a web crawler capture on Archive.org.]
 5 to 10 minutes
 45 to 60 minutes
 1 cent  $1 per group of students
 Ages 6  14
 Activity, Exhibit, Model
 English
Quick Guide
Materials List (per group of students)
 rectangular, flat objects (e.g., dollar, stick of gum, postit note, playing card)
 Rulers
 large sheets of paper, if possible, with 1/2” or larger grid squares
 Pencils, markers, scissors
 scrap paper
Subjects

Mathematics

Algebra
 Variables and Expressions

Geometry
 Plane Geometry

Measurement
 Units of Measurement
 Size and Scale

Number and Operations
 Operations
 Representation

Algebra

The Nature of Technology
 The Design Process

The Nature of Science

The Scientific Process
 Asking Questions

The Scientific Process
Informal Categories
 Arts and Crafts
 Model Building
Audience
To use this activity, learners need to:
 see
Learning styles supported:
 Involves teamwork and communication skills
 Involves handson or lab activities
Other
Access Rights:
 Free access
By:
Source Collection
 Mixing in Math
Rights:
Funding Source:
 NSF, ESI0406675 and DRL0713537