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Examples of Teaching with Demonstrations


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Why is Chlorophyll Green? part of Examples
This is an out of class exercise that allows students to explore biological molecules that contain heme like molecules with metals bound in them. The properties of these molecules give them different colors and functions, but all are related evolutionarily.

Subject: Biology

Adhesion, Cohesion, and Surface Tension Demonstration part of Examples
This short (<5-10 minutes) pair of demonstrations uses glass slides with a very thin film of water to demonstrate the cohesive and adhesive forces of water molecules, and a needle floating on water to demonstrate surface tension.

Subject: Geoscience:Hydrology

Presenting the Geologic Timescale part of Examples
This project has students model the geologic timescale using distance as a metaphor for time. Students give presentions spaced at distances which represent how far apart in time the events occurred.

Subject: Geoscience:Geology:Historical Geology

Pressure Melting of Ice: While-U-Wait part of Examples
In this demonstration, students get to witness pressure melting and regelation first-hand. A weight is suspended via a thin wire over an ice cube. Over the course of the course of the demonstration, the wire passess through the ice, leaving undamaged ice in its wake.

Subject: Physics, Geoscience:Hydrology

Resolving Force Vectors: Interactive Demonstration part of Examples
This is an Interactive Lecture Demonstration for resolving force vectors using the suspended block demonstration (1J30.10).

Subject: Physics:Classical Mechanics

The unemployment rate for the class part of Examples
After predicting what the unemployment rate will be for students in the class, a confidential survey modeled on the Current Population Survey questions is used to gather data about each student's employment. Students use this data to measure the class unemployment rate and then assess its accuracy.

Subject: Economics:Macro

Monopoly gas station part of Examples
Students predict then calculate and graph profit-maximizing the price for an isolated, desert monopoly gas station.

Subject: Economics:Markets

Price elasticity of demand survey part of Examples
Students survey class members to estimate the price elasticity of demand for a number of goods and services.

Subject: Economics:Micro

Shape of the demand curve part of Examples
A classroom auction reveals reservation prices and a demand curve for an introductory economics course.

Subject: Economics:Markets

Law of Diminishing Marginal Returns part of Examples
An ILD to help demonstrate the Law of Diminishing Marginal Returns using an experiment.

Subject: Economics