CK-12 Foundation
Exponential Terms Raised to an Exponent: Exponential Sliders
Discover the pattern of exponents through an interactive lesson. Young mathematicians manipulate sliders and watch the result as they change the base or exponents in an expression. The tutorial shows them the simplified expression and...
CK-12 Foundation
Radical Equations: Geometric Visual of a Square Root
How can you draw a number? A set of questions takes learners through the reasoning for why a geometric construction can be drawn to represent the square root of a number. An interactive helps visualize the construction.
Virginia Department of Education
Give or Take a Few
Young mathematicians extend their knowledge of rational numbers on a number line to graph inequalities by first using number cards to compare rational numbers. They finish by using similar reasoning to graph inequalities on a number line.
Illustrative Mathematics
Daisies in Vases
Have your first graders master word problems with an activity that prompts them to find as many combinations for daisies in vases, with the most in the large vase and the least in the small vase. Pupils must also explain their reasoning...
CK-12 Foundation
Multi-Step Equations
It's important to know why each step in solving an equation works. Scholars order the steps and reasons when solving a multi-step equation. Solutions require using the distributive property, combining like terms, and using properties of...
PBS
Why Do We Have Seasons?
Explore the reason for the seasons! An interactive lesson allows learners to explore the earth's rotation from the viewpoint of four cities at different latitudes. It provides descriptive information at eight points during the orbit...
Penguin Books
A Teacher's Guide to Sue Monk Kidd's: The Secret Life of Bees
A 12-page teacher's guide to Sue Monk Kidd's The Secret Life of Bees provides the discussion questions and activities that lead readers to understand not only Lily's fears, but her reasons behind them.
CK-12 Foundation
Infinite Limit Type: Asymptotes and End Behavior Question
There are an infinite number of reasons to use the resource. Scholars drag vertical and horizontal lines to the graph of a rational function to identify all asymptotes. They investigate the connection between asymptotes and limits to...
CK-12 Foundation
Zeroes and Intercepts of Polynomials: Function Intercepts
There is zero reason not to use the resource. Given a graph with a polynomial function and a linear function, scholars move the line in an interactive. To wrap up the lesson, they note how zeros and intersection points change.
Beyond Benign
Daphnia Bioassay LD50
De-icing materials may have a harmful effect on our environment; have your class perform an experiment to test the nature of these effects. Scholars monitor the survival rate of a sample of daphnia as the concentration of a de-icing...
CK-12 Foundation
Solving Logarithmic Equations
Pupils follow a chain of reasoning in deconstructing a logarithmic equation step by step. Using their knowledge of logarithms, learners compare the solutions of logarithmic equations when the bases are changed.
DiscoverE
Nanosolutions
There are a billion reasons to use the resource! Well, not quite. A demonstration using food color and water shows scholars the meaning of nano. An iterative process results in diluting the concentration of food coloring by one tenth...
Yummy Math
Sweethearts Candy
Sweethearts® candies are a beloved Valentine's Day treat—so much so that eight billion hearts are produced every year around the world! Learners use number sense reasoning and critical thinking to solve nine word problems about the...
Next Generation Science Storylines
Why Don't Antibiotics Work Like They Used To?
Bacteria get more resistant to antibiotics every year. Learn the reason for this pattern and how scientists are addressing the problem in a six-week unit. Learners analyze different types of bacteria and their adaptations.
National Research Center for Career and Technical Education
Salads
Lettuce talk for a moment about your culinary scholars; do they have what it takes to create a great salad? Show them the finer points of salad preparation with a career and technology lesson plan that combines direct instruction,...
101 Questions
Suitcase Circle
Analyze patterns in a circular arrangement. After using a geometric construction to complete a circle, learners use proportional reasoning to make predictions. By determining the length of an arc built from suitcases, they estimate the...
PBS
Sherpas on Everest
Every successful climb of Mount Everest can be attributed to the assistance of the local Sherpas. A short, informative article explains the history behind the Sherpa's involvement in Mount Everest expeditions, the physiological reasons...
Centers for Disease Control and Prevention
Youth and Tobacco Use
There are a number of social, emotional, and physiological reasons why teenagers start smoking, and why they continue smoking into adulthood. Help class members understand why smoking begins in youth—and how to protect themselves from...
National Nanotechnology Infrastructure Network
The Micro and Macro World Around Us
Don't let your eyes play tricks on you ... use scale to keep your eyes in check! Young scholars observe images without scale and try to identify the structure. Then, they look at the same image with a scale bar and assess whether their...
101 Questions
Money Duck
A video presentation shows duck-shaped soap that has a $1, $5, $10, $20, or $50 bill in its center. Learners consider different population distribution of the bills to determine a reasonable price for the duck.
Kenan Fellows
Reaction Stoichiometry—How Can We Make Chalk?
What is a reasonable percent yield in the manufacturing process? Scholars develop a process for producing chalk in the third activity of a six-part series. Then, they must determine the theoretical and percent yield. Discussions about...
Constitutional Rights Foundation
The War of 1812: America’s First Declared War
Free Trade and Sailor's Rights! Pupils dive into America's first declared war, the War of 1812. They analyze the presidencies of Jefferson and Madison through diary entries and historical reasoning. To conclude the lesson, they use their...
Constitutional Rights Foundation
Rachel Carson and the Modern Environmental Movement
Scholars analyze the environmental movement started in the 1960s. Through excerpts from Rachel Carson's books as well as diary entries, they take a look at the reason for the modern movement to save the planet and then create final...
University of North Carolina
Procrastination
Inevitably, whenever you give an assignment, at least one person won't start until the last minute. As the 13th handout in the 24-part Writing the Paper series explains, procrastination sometimes brings consequences. It breaks down...
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