1A Measurement

One Light Nonosecond

Catalog: 
1A10.36
Location: 
Aa2
A plastic bar machined to a length that light travels in one nanosecond.

1 Liter Block

Catalog: 
1A10.501
Location: 
Aa2

A wooden 1 liter block with 1cm rules on the sides.

Radian disc - Video

Image copyrighted by The Education Group and used by permission.
Catalog: 
1A50.10
Location: 
3_1
Video Encyclopedia: A flexible strip of plastic equal to the radius is bent around the edge of a circle.

Gaussian curve - Video

Image copyrighted by The Education Group and used by permission.
Catalog: 
1A20.10
Location: 
3_1
Video Encyclopedia: A commercial device for the overhead projector where ball bearings roll through an array of nails into parallel chutes.

Proofs of Pythagoras

Catalog: 
1A50.101B
Location: 
Aa3

A set of three transparent models that can be used to prove the Pythagorean Theorem algebraically and by inspection.

Pythagorean Theorem

Catalog: 
1A50.101A
Location: 
Aa3

Five identical triangles can be arranged to show squares on each of the triangles sides, but one at a time.

Meter stick - 4 sided

Catalog: 
1A10.35
Location: 
Aa2

An orange and white 4-sided stick that is graduated in meters, decimeters, centimeters, & millimeters. Useful for showing the relationship between SI prefixes, or as a more colorful/aesthetic version of a regular meter stick. 

Chalkboard Globe - Large

Catalog: 
1A30.40A
Location: 
Aa1

A large blank globe that can be drawn upon with chalk.

Chalkboard Globe - Small

Catalog: 
1A30.40B
Location: 
Aa1

A smaller blank globe that can be drawn upon with chalk.

Right Hand Rule

Catalog: 
1A40.80
Location: 
Aa3

This model shows the curl of a vector and how the direction of a magnetic force can easily be determined.