Curated OER
Indirect Proof and Inequalities in One Triangle
In this geometry worksheet, 10th graders order the sides and angles of a triangle and determine the range of the third side of a triangle given the lengths of two sides. The one page worksheet contains sixteen questions. ...
Curated OER
Our Wonderful Stories: Lesson Plan 5
The fifth installment in a writing unit that culminates with a Hyperstudio illustrated group story project, this plan is ripe with ideas for ways to design group writing projects for elementary writers. Use the whole unit as a base from...
Curated OER
Defining Division
Upper graders explore division through fair-shares. They will review fair shares and fractions as a segway into division. They start by playing "Share Fairly" game and create mathematical arguments for solving problems. Manipulatives and...
Illustrative Mathematics
Points equidistant from two points in the plane
Young geometers apply their deductive reasoning skills and knowledge of proving triangles congruent in a task that asks them to prove if a point lies on the perpendicular bisector of a segment, then it is equidistant from the endpoints...
Curated OER
Pythagorean Theorem by Graphic Manipulation
There are many different ways to show a proof of the Pythagorean Theorem. Here is a nice hands-on paper cutting activity that shows a graphic representation. You can even challenge your young Pythagoreans to come up with their own...
Curated OER
Getting it Right! An Investigation of the Pythagorean Theorem
In order to learn about the Pythagorean Theorem, young mathematicians investigate relations and patterns between different sides of a right triangle to look for possible relations among the squared sides. Once they have established the...
Curated OER
Comprehension Strategies: Drawing Inferences
The proof is in the details! A richly detailed plan provides clear examples of how to draw inferences from text and how to provide support drawn directly from the text.
Curated OER
Module 8---Things You Can't Live Without
In this necessities worksheet, students choose eight out of ten various necessities to write a definition for utilizing relative clauses. Students read and edit/proof-read an email associated with a party.
Curated OER
The Engineering Design Process
Design your own video game, engineer accident-proof highways, or even develop a new phone app! The Engineering Design Model can be used with all ages and in all subject areas to create a product, system or service. The resource explains...
NASA
Building for Hurricanes: Engineering Design Challenge
"By the hair on your chinny-chin-chin, I'll huff and I'll puff and I'll blow your house in," says the big, bad wolf! Engineering hopefuls are challenged to design and construct a hurricane-proof building from simple office and craft...
Roy Rosenzweig Center for History and New Media
Sarah Green Probate Record
The proof is in the probate record. Much can be learned about history by investigating old, primary source documents. Class members hone their detective skills by examing the 1759 probate record of Sarah Green. Who was this lady? Was she...
EngageNY
Algebraic Expressions—The Commutative and Associative Properties
Who says math is boring? Turn dry concepts like properties and vocabulary into an interesting lesson! Examine the commutative and associative properties of addition and multiplication using geometric reinforcement. Through collaboration,...
EngageNY
How Do Dilations Map Segments?
Do you view proofs as an essential geometric skill? The resource builds on an understanding of dilations by proving the Dilation Theorem of Segments. Pupils learn to question and verify rather than make assumptions.
EngageNY
Special Relationships Within Right Triangles—Dividing into Two Similar Sub-Triangles
Why are right triangles so special? Pupils begin their study of right triangles by examining similar right triangles. Verifying through proofs, scholars recognize the three similar right triangles formed by drawing the altitude. Once...
Civil War Trust
Civil War Personalities Lesson Plan
Caring, trustworthiness, and responsibility—these are only a few character traits in focus of a lesson based on stories from the Civil War era. Class members explore several influential lives while reading biographies that highlight...
EngageNY
Multiplying Polynomials
There's only one way to multiply, right? Not when it comes to polynomials. Reach each individual by incorporating various representations to multiplying polynomials. This lesson approaches multiplying polynomials from all angles. Build...
EngageNY
Law of Cosines
Build upon the Pythagorean Theorem with the Law of Cosines. The 10th part of a 16-part series introduces the Law of Cosines. Class members use the the geometric representation of the Pythagorean Theorem to develop a proof of the Law of...
Science Matters
Earthquake Building/Shaking Contest
Japan is one of only a handful of countries that constructs buildings that are almost earthquake proof. The 13th lesson in the 20-part series challenges scholars to build structures to test against earthquakes. With limited materials and...
Cornell University
Polymers: Making Silly Putty
Putty is proof that learning can be fun! Share the wonderful world of polymers with your class through an experiment. Young scientists create their own silly putty, then examine its properties.
CK-12 Foundation
Limit of a Sequence: Finding the Limit of a Sequence (Part 2)
What does it mean if young mathematicians cannot put the squeeze on a sequence? Learners investigate a divergent sequence and find the formula for the nth term. Using the definition of a limit of a sequence, pupils try to find the limit...
Swiss Agency for Development and Cooperation
Gender and Sport
Serena Williams, Mia Hamm, and Danica Patrick are living proof that women enjoy sports just as much as men. Sports enthusiasts read about the importance of gender equality on the playing field. They discover barriers to participation and...
CCSS Math Activities
Smarter Balanced Sample Items: 8th Grade Math – Claim 3
Communication is the key. A dozen sample items require scholars to communicate their reasoning involved in arriving at a solution. The PowerPoint from the Gr. 8 Claim 2 - 4 Item Slide Shows series uses a variety of content to...
Howard Hughes Medical Institute
Determining the Size and Energy of the K-T Asteroid
Two different groups of scientists published scientific papers in 1980 offering proof of a large asteroid hitting Earth between the Cretaceous and Tertiary layers of ground. Scholars use a worksheet to analyze the same type of data as...
Cold Spring Harbor Laboratory
Genes Are Real Things
Proving microscopic structures exist is a difficult task. Learn how scientists did just that in the mid-1800s as they set out to identify the cellular structures related to genetics. The online lesson explains the collection of work that...
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