Illustrative Mathematics
Make 9
Learning how numbers are put together as parts and wholes is a big step in building the foundational number sense of young mathematicians. Here, children are given a number less than 10 and are asked to find as many pairs of numbers as...
Curated OER
Area Applet
Elementary math classes calculate the area of a shape and explain the correlation between the size of the perimeter and the areas that can be contained within that perimeter. They also explain the effect the shape of the perimeter has on...
Curated OER
Modeling Addition: Commutative Property and Zero Property
First graders practice modeling addition. In this hands-on addition lesson plan, 1st graders are introduced to the Commutative Property of Addition and the Zero Property of Addition through modeling and the use of manipulatives. This...
Mathematics Assessment Project
Identifying Similar Triangles
Math whizzes work with angle sums and exterior angles to figure out the measure of other angles. This particular publication provides comprehensive support in the form of an anticipatory activity, questions designed to prompt discussion,...
EngageNY
Unknown Angle Proofs—Writing Proofs
What do Sherlock Holmes and geometry have in common? Why, it is a matter of deductive reasoning as the class learns how to justify each step of a problem. Pupils then present a known fact to ensure that their decision is correct.
Illustrative Mathematics
Discounted Books
Adolescents love to shop, especially when an item is discounted. Here, shoppers only have a set amount of money to spend. Will they be able to make a purchase with the discount and tax added in? Percent discounts can be calculated...
Curated OER
Nothing To It!
First graders explore the zero property of addition and subtraction through the creation of a class book. Includes an assessment sheet.
Curated OER
Got These Properties? (Commutative in Addition/Zero in Addition and Subtraction)
Second graders examine the commutative property of addition and the property of zero in addition and subtraction. They complete an asessment worksheet to gain practice reading and working number sentences horizontally and vertically.
Curated OER
Sticky Note Math
Sixth graders examine mathematical problems that deal with he division of fractions. Sticky notes are used to model the process.
Curated OER
Worksheet #2: Algebraic Expressions
In this algebraic expression worksheet, learners evaluate algebraic expressions involving the addition, subtraction, division, and multiplication of negative and positive integers. Students identify mathematical properties and find the...
Curated OER
Water Cycle
Young scientists explore Earth elements by conducting an experiment. They define water vocabulary terms such as condensation and precipitation. In addition, they conduct a water experiment in which they build a terrarium, so they can...
Curated OER
Additive Inverses
Students investigate properties of additive inverses. In this properties of additive inverses lesson, students discuss the what it means for two numbers to be opposites. Students discuss representing opposite numbers using a...
Curated OER
Adding and Subtracting Polynomials
For use with a TI-nspire calculator, this lesson focuses on adding and subtracting polynomials. Learners use calculator to add and subtract polynomials using both the vertical method horizontal methods. A class discussion follows the...
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
Integer Algebraic Addition
Students use algebra tiles to solve linear equations with integer solutions. In this algebra lesson plan, students use the additive inverse and the zero pair concept.
Curated OER
Equal Additions
Students explore the relationships between numbers through the use of "equal addition" and "equal subtraction." Through the use of number sense, they are able to computer addition and subtraction problems mentally. Individually,...
Curated OER
Discovering Math: Computation
Middle schoolers add, subtract, multiply, and divide rational numbers. They find the square and the cube of numbers. They create a game incorporating computation on rational numbers. Everyone works together to write and evaluate...
Curated OER
Discovering Math: Concepts in Geometry
Middle and high schoolers explore the concept of proving the Pythagorean Theorem. They research proofs of the Pythagorean Theorem. Pupils create posters of proofs, and research Greek mathematicians.
Curated OER
The Human Calculator
Students amaze their friends and families with this human calculator trick. For this algebraic lesson, students use the associative property of addition to act as a human calculator and stump their volunteers. The steps to the trick,...
Curated OER
Mathematical Properties
Seventh graders discuss the associative property of math. They are to find examples of the property and others. They also write in their journals about what they learned.
Curated OER
Multiplicative and Additive Identity
Students explore the identity properties of multiplication and of addition. They answer riddles that have to do with the identity properties and observe the teacher explanation of each property as they are modeled on the board. ...
EngageNY
Two-Step Problems—All Operations
Step 1: Use the resource. Step 2: Watch your class become experts in solving two-step problems. Scholars learn to solve two-step word problems in context. They use tape diagrams and algebraic techniques to break the problem into two,...
EngageNY
Solving Inequalities
Do properties of equations hold true for inequalities? Teach solving inequalities through the theme of properties. Your class discovers that the multiplication property of equality doesn't hold true for inequalities when multiplying by a...
EngageNY
Triangle Congruency Proofs (part 1)
Can they put it all together? Ninth graders apply what they know about proofs and triangle congruence to complete these proofs. These proofs go beyond the basic triangle congruence proofs and use various properties, theorems, and...
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