Should the U.S. get rid of the penny? Each year the United States Mint spends more money producing pennies than the pennies are worth. Confronted with a similar issue, other countries have decided to get rid of their 1-cent coins altogether.
In this lesson, students operate with decimals to calculate the total costs to produce different U.S. coins. Students debate eliminating the penny and then consider a world with no physical money at all.
Add, subtract, and multiply positive and negative numbers to answer real-world questions
Operate fluently with decimals in a real-world context
Before you begin
Students should be able to fluently operate with multi-digit decimals.
How do the rules of an election affect who wins? Students calculate (as a percent) how much of the electoral and popular vote different presidential candidates have received, and add with integers to explore elections under possible alternative voting systems.
Number System (NS), Ratios and Proportional Relationships (RP), Reasoning with Equations and Inequalities (REI)
How do you determine the best scorer in basketball? Students compare LeBron James and Tyson Chandler in various ways, from total points, to points per game/minute, to a new measure called net points in order to decide.
Number System (NS), Ratios and Proportional Relationships (RP)
How much should you pay for a shared wireless plan? Students use proportional reasoning to predict whether a family will go over their minutes, messages, or megabytes, and decide how much each person should pay.
Expressions and Equations (EE), Number System (NS), Ratios and Proportional Relationships (RP)
Should fast food restaurants rewrite their menus in terms of exercise? Students write and evaluate expressions to determine how long it takes to burn off foods from McDonald’s and debate the pros and cons of including this information on fast food menus.
Ratios and Proportional Relationships (RP), Expressions and Equations (EE)
How have temperatures changed around the world? Students compare current temperatures to historical averages, and add and subtract positive and negative numbers to explore how the climate has changed in various cities over time.
What's the best way to bet on the Super Bowl? Students add and subtract positive and negative numbers to determine which bets have been the most effective and consider the best ways to win big on the big game.
Is there an upside to having a bad day? Students use positive integers, negative integers, and absolute value to describe the emotions of a day and discuss the important role that different emotions play in our lives.
How has the pace of human innovation changed over time? Students order and subtract integers to explore major milestones in human history and debate whether humans are innovating faster than we can keep up with the consequences.
How has Earth’s temperature changed over time? Students use positive and negative integers to compare recorded monthly temperatures to their long-term averages and consider actions they can take to take care of the planet.
How have video game consoles changed over time? Students create exponential models to predict the speed of video game processors over time, compare their predictions to observed speeds, and consider the consequences as digital simulations become increasingly lifelike.
Building Functions (BF), Interpreting Categorical and Quantitative Data (ID), Interpreting Functions (IF), Linear, Quadratic, and Exponential Models (LE), Seeing Structure in Expressions (SSE)