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Discovery Education
By the Foot: The History of Measurement
When is a foot not a foot? When you use the length of your own foot to measure distances, of course. To underscore the importance of standardized units of measurement, middle schoolers engage in a series of activities that ask them to...
National Security Agency
Backyard Building - Area and Perimeter
Turn young mathematicians into landscape architects with this four-lesson series on area and perimeter. Beginning with a basic introduction to calculating perimeter and area using non-standard units of measurement, this...
Laboratory for Atmospheric and Space Physics
Charting the Progress of New Horizons
In 2006, New Horizons began its mission to fly to Pluto. As it continues its journey, scholars track its progress with the help of an informative website, all the while reinforcing measurement concepts with the construction of a scaled...
Rainforest Alliance
Colombia Biodiversity
How diverse is the rainforest? How much more diverse is a rain forest than a temperate forest? Explore these focus questions in a lesson that explores the plants, animals, and insects in forests. After listening to a reading...
National Security Agency
Time After Time
Save those precious minutes and hours spent planning math lessons with this mini-unit on telling time. Offering a series of engaging hands-on and collaborative learning activities, these three lessons teach children how to read...
West Contra Costa Unified School District
Pythagorean Theorem and Its Converse
Challenge scholars to prove the Pythagorean Theorem geometrically by using a cut-and-paste activity. They then must solve for the missing sides of right triangles.
West Contra Costa Unified School District
Arcs and Angles
Noah didn't construct this kind of arc. High school scholars first explore how angles can be formed in circles. They then learn relationships between angles and arcs by conducting an exploratory activity where they position and draw arcs...
Missouri Department of Elementary
Similar and Different
Using a Venn diagram, pupils compare the similarities and differences between two classmates. Next, they review the CARE acronym (Collaboration, Acceptance, Respect, Empathy) and discuss how it applies to diversity in the classroom.
Curated OER
All About Money
Few topics engage young mathematicians as much as learning about money. Through a series of shared readings and hands-on activities, children explore the US currency system, learning how to count money and calculate change as they create...
Federal Reserve Bank
Making Sense of the Ups and Downs of Prices
What are the consequences and costs of inflation? What is CPI, and how do we calculate it? This resource answers these questions in an organized and in-depth manner, and also includes a worksheet of follow-up questions designed for...
Missouri Department of Elementary
Same and Different
A take on "If You're Happy and You Know It" opens a lesson about similarities and differences. Scholars speak in-depth on the unique characteristics that make up their classroom. The teacher or counselor records responses. Class members...