Population Growth, Ecological Footprints, and Overshoot
Rikki Wagstrom, Metropolitan State University
In this activity, students develop and apply linear, exponential, and rational functions to explore past and projected U.S. population growth, carbon footprint trend, ecological overshoot, and effectiveness of hypothetical carbon dioxide reduction initiatives.

Estimating OUR Carbon Footprint
Ben Galluzzo, Shippensburg University of Pennsylvania; Jean McGivney-Burelle, University of Hartford; Rikki Wagstrom, Metropolitan State University
Description here.

An In-Class Experiment to Estimate Binomial Probabilities
Jessica Utts, University of California-Davis
This hands-on activity asks students to conduct a binomial experiment and calculate a confidence interval for the true probabiity. It is useful for involving students, and for having a discussion about the interpretation of confidence intervals and the role of sample size in estimation.

Independent Samples t-Test: Chips Ahoy® vs. Supermarket Brand
Dexter Whittinghill, Rowan University
In this hands-on activity, students count the number of chips in cookies in order to carry out an independent samples t-test to compare Chips Ahoy® cookies and a supermarket brand. It can involve discussion of randomness and independence of samples, comparing two parameters with null and alternative hypotheses, and the practical issues of counting chips in a cookie.

Seeing and Describing the Predictable Pattern: The Central Limit Theorem
Shirley Alt, University of Minnesota-Duluth
This activity helps students develop a better understanding and stronger reasoning skills about the Central Limit Theorem and normal distributions. Key words: Sample, Normal Distribution, Model, Distribution, Variability, Central Limit Theorem (CLT)

Should I Unplug?
Lori Carmack, Salisbury University
Short Description goes here: Short DescriptionThis section should be a distillation of the summary above. This description will be displayed in search returns. The optimal length for this description is on the order of 1-2 sentences. Short Description goes here:

Plastic Waste Production
Karen Bliss, Quinnipiac University
In this exercise, students will use data to predict the amount of plastic waste in the next ten years.

Choosing Between Home Appliances: Benefits to the Planet and Your Wallet
Corri Taylor, Wellesley College
Students research various options for new appliances and make purchasing decisions based not merely on purchase price, but also on energy efficiency, which has implications for the planet AND for longer-term personal finances. Students calculate the "payback period" for the more energy efficient appliance and calculate long-term savings.

Back-of-the-Envelope Calculations: Percentage of Copper in Ore
Barb Tewksbury, Hamilton College
Question Suppose that you are building a new house. It will take about 90 kg (198 pounds) of copper to do the electrical wiring. In order to get the copper in the first place, someone needs to mine solid rock that ...

Reasoning About Center and Spread: How do Students Spend Their Time?
Shirley Alt, University of Minnesota-Duluth
This activity helps students develop better understanding and stronger reasoning skills about distributions in terms of center and spread. Key words: center, spread, distribution