Las Cumbres Observatory
The Cosmic Distance Ladder: Parallax
Scientists don't have a ruler long enough to measure to the stars, so they rely on math. Scholars learn to calculate the distance from Earth to a star using the parallax method. They use angle measures from different perspectives to...
Curated OER
Math: Tangents
Students discover how to recognize tangents and how to use their properties. They investigate and use the properties of angles, arcs, chords, tangents, and secants. Students use two tangents and the properties of similar triangles to...
Curated OER
Properties of Logarithms
Eleventh graders investigate logarithms. In this Algebra II lesson, 11th graders explore the properties of logarithms that are used to simplify expression and solve equations. Students confirm their conjectures regarding the...
Curated OER
Math: Equal Area Triangles
Pupils examine a math worksheet and determine how to divide a single triangle into four of equal area. Using geometric principles, they sketch two additional ways to divide into into four equal triangles. To conclude, students explain...
Curated OER
Pattern Search
Third graders review the commutative and associative property in mathematics. Using a worksheet, they work together to identify the patterns between the 32 triangles. To end the lesson, they create their own array and exchange it with...
Curated OER
What Does It Matter?
Young scholars match definitions with vocabulary words and learn basic facts about matter. Then, they see how to determine the physical characteristics of matter. They determine the mass, volume, and density of objects using appropriate...
Curated OER
The Difference of Two Squares
Learners practice the use of number properties through exploring the difference of two squares, creating an array model for multiplication, and work with decimal numbers. In groups, students explore patterns in an array and determine...
Curated OER
As the Bird Flies
Students investigate the properties of lines and congruent triangle theorems as well as apply geometric properties and relationships to real-world mathematical problems. Given two different scenarios, they examine maps that have been...
Curated OER
The Commutative Cookie
Third graders investigate the commutative properties of multiplication and focus upon the setting of cubes in the correct patterns to solve problems. They differentiate between numbers that have multiple factors and prime numbers....
Curated OER
Representing Relationships with Equations
Learners explore Cuisenaire Rods. In this pre-algebra lesson, students work with a partner to generate addition problems with the sum of ten using Cuisenaire Rods. Learners construct examples of the Commutative Property using...
Curated OER
Rice and More Rice
Fifth graders explore problem solving strategies for mathematical estimation. In this math problem solving instructional activity, 5th graders predict how many grains of rice are in a jar, practice establishing and looking for patterns...
Curated OER
Animal Classification Unit
Third graders study how to group animals by their physical characteristics. They examine how animals have adapted to have their needs met by the environment.
Curated OER
Design a Track
Learners investigate track and field dimensions, measure an actual track, and construct a scale model. The use of a meter stick, dimensional analysis, and the application of the distributive property to variables forms the main focus of...
Curated OER
Slippery, Slippery Ice
Young scholars investigate how salt affects ice by experimenting in class. In this water properties lesson, students utilize a penny, salt and pans of ice to examine the sliding ability of a penny across a layer of ice. Young...
Curated OER
Addition & Subtraction Properties With Integers
Sixth graders use a number line to solve addition and subtraction problems. In groups, they play a game of "Human Number Line Relay." They use a deck of cards to randomly create addition and subtraction equations and physically walk a...
Curated OER
Exponential and Logarithmic Equations
In this algebra worksheet, 11th graders solve exponential and logarithmic functions using properties of exponents and logs. There are 56 questions with an answer key.
Curated OER
Subtracting Monomials and Polynomials
Students subtract monomials and polynomials by combining like terms. In this advanced subtraction lesson, students define the rules and properties for subtraction of polynomials. They apply the rules for addition to help with the rules...
Discovery Education
Exploring Geometry
Middle schoolers construct a three-dimensional model of a city using both similar and congruent figures and geometric transformations. City must have at least ten buildings with each building labeled and may be constructed out of paper...
Buffalo State
Adding and Subtracting Integers Unit
Just because one integer is larger than another doesn't mean it will make sense right away. Go beyond note taking and show learners, through the use of algebra tiles and a Four-Pan Algebra Balance, how the numbers relate to one...
Pennsylvania Department of Education
Problem Solving with Fractions
Solve story problems using fractions or decimals. Then, determine the reasonableness of answers using estimation.The detailed instructional activity includes essential questions, vocabulary, a materials list, and links to related units.
Curated OER
Fraction Strips
Get a handle on equivalent fractions through the use of manipulatives. Using area models, sets, and length manipulatives like fraction strips and Cuisenaire rods, the class will gain a deeper understanding of equivalent fractions....
Curated OER
Fractions and Paper Folding
In this fraction lesson, students manipulate paper by folding it to create different shapes and sizes, they explore the concept of fractions, and discuss their observations as a class. This is a great lesson for getting students...
Curated OER
Properties of Color
Second graders explore the properties of primary color and investigate what happens when primary colors are mixed. They listen to the story The Crayon Box That Talked and list the colors. They experiment mixing primary colors and...
Curated OER
Extra Practice 6: Using the Distributive Laws and Factoring
In this practice worksheet, students solve multiplication equations by using the distributive property, factoring, and the integer rules. They solve 32 problems on this one-page worksheet.
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