Your Environmental Impact
Eric Baer and Mayra Hernandez, Highline Community College
The following homework assignments are designed to build understanding of personal water use, sewage, waste generation and disposal, pollution sources and impacts, and energy use and costs.

Various Group Activities Using Learning Assistants
Stephanie Chasteen, University of Colorado at Boulder
Undergraduate Learning Assistants have been used to facilitate group work in a variety of ways, such as in-lecture tutorials and worksheets, group work in required recitations, and group work in optional ...

The physics and engineering of a trebuchet
Brad Hubred, Little Falls Community Middle School, Little Falls, MN Some of the activities for this lesson are from the activity book called "Trebuchet's teacher's guide" by: Jennifer Fenske, published by: Pitsco, Inc. in 2006.
This activity is a hands on investigation in which students will construct, and launch a trebuchet.

Investigating Natural Selection: Observing Stabilizing and Directional Selection through Graphical Analysis of Population Samples.
John Haug
This lab activity demonstrates the difference between stabilizing and directional natural selection using two separate populations of sunflower seeds.

Incomprehensibly Small and Incomprehensibly Large
Vince Cronin, Baylor University
Students are asked to consider the length scales of the universe, from smallest to largest. Using a logarithmic scale in cm units, various distances are resolved ranging from the smallest meaningful length in ...

Radiometric Dating
Related Links Radioactive Decay Exponential Growth and Decay Peter Kohn - James Madison University Christopher Gellasch - Uniformed Services University Jim Sochacki - James Madison University Scott Eaton - James Madison University Richard Ford - Weber State University
This activity leads students through derivations of the equations associated with radiometric dating.

Biking vs Driving
Deirdre Smeltzer, Eastern Mennonite University
How much difference would biking to work one day per week make?

Information Theory by own student' discoveries with MATLAB
Yevgeny Gayev, National aviation university
I present my recent textbook "Information Theory Processes by own student' discoveries with MATLAB and Java" (in Ukrainian) and my educational course associated with it.

Effectiveness of MN dams in water retention/ Efectividad de represas en Minnesota con respecto a la retencion de agua
Tania Ramos (unemployed), Home: 1018 Chestnut st. Taylors Falls, MN 55084
This activity is a field trip investigation where students gather stream flow, volume, depth & height (area) data on Ramsey County dams (Keller and Round lake), interpret their findings and make in-depth observations in order to assess the effectiveness of dams through the season and estimate the life-spam of the dams in years.

A View from the Back of the Envelope

Mitchell N. Charity
This website is devoted to different methods of approximation. The site describes using orders of magnitude, scaling, simplifying numbers, exponential notation, and Fermi questions. Included with the ...