Trace Gases: Stella II Mac and PC part of Examples
This Stella model allows students to learn about chemical mass balance in the atmosphere and apply this to atmospheric chlorofluorocarbon and carbon dioxide concentrations.

Sea Floor Spreading I part of Examples
In this introductory Excel tutorial (Activity I) students use Excel to explore the geodynamics model equation for ocean depth around a sea-floor spreading center. For students with no prior Excel experience.

Sea Floor Spreading II part of Examples
Students import ocean bathymetry data from text files, they then use Excel to graph these observations along with model prediction to assess the model's ability to simulated the observed topographic features of the North Atlantic.

Human Demographics part of Examples
In this biology simulation students explore factors that change human population growth including age at which women begin to bear children, fertility rate and death rate.

Genetic Drift part of Examples
In this biology simulation, students use a mathematical simulation of genetic drift to answer questions about the factors that influence this evolutionary process. Students run a series of simulations varying allele frequency and population size and then analyze their data and propose a model to explain their results.

Medicine in the Body part of Pedagogy in Action:Library:Teaching with Spreadsheets:Examples
In this activity, we will explore how the dosage and frequency of a medicine taken affect the amount of medicine present in the blood.

Fishing Game: Stella PC and Mac part of Examples
As manager in the fish and wildlife service you are charged with making policy regarding the management of a regional fishery.

Salmon Smolt: Stella PC and Mac part of Examples
The Stella Smolts Migration Model focuses on the spring migration of hatchery smolts to the ocean. It may be used to test the relative merits of barging fish or drawing down the reservoirs to help the smolts reach the ocean.

Sun Path: Interactive On-line Mac or PC part of Examples
Students use SunPath in the yearly mode to investigate seasonal changes in sunrise, sunset, length of day and sun altitude at their own latitude. JAVA activity for Mac or PC.

Sea Floor Spreading I part of Examples
In this introductory Excel tutorial (Activity I) students use Excel to explore the geodynamics model equation for ocean depth around a sea-floor spreading center. For students with no prior Excel experience.