Lesson Plan
Alabama Learning Exchange

Alex: My Favorite Number

For Teachers 4th - 7th
The activity allows students to review many of the number theory concepts. Students will pick a composite number write verbal expressions about the number, find the factors, prime factorization, list multiples, draw a cartoon character...
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Oswego City School District

Regents Exam Prep Center: Practicing With Properties of Real Numbers

For Students 9th - 10th Standards
Test your knowledge of the number properties. This challenging practice really puts you to the test. Assessment covers all number theory properties: associative, commutative, distributive, inverse, and identity.
Handout
Wolfram Research

Wolfram Math World: Calculus and Analysis

For Students 9th - 10th
Over two dozen links are provided at this MathWorld site. From Polynomials and Series to Dynamical Systems and Catastrophe Theory, each link provides in-depth explanations and relevant diagrams of the topics at hand.
PPT
Sophia Learning

Sophia: Using Order of Operations

For Students 9th - 10th
This lesson will explain the rules regarding order of operations and present the situations in which knowing the order of operations becomes necessary.
Whiteboard
ClassFlow

Class Flow: Number Theory Order of Operations

For Teachers Pre-K - 1st Standards
[Free Registration/Login Required] This flipchart will help students understand the order of arithmetic operations with rational numbers. It includes exercises and assessment questions.
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Oswego City School District

Regents Exam Prep Center: More Practice With Properties of Real Numbers

For Students 9th - 10th
How well do you know your number properties? Take this quiz and find out what you know or what you don't know. Immediate feedback. Check your answer right online.
Handout
Wikimedia

Wikipedia: Additive Inverse

For Students 9th - 10th Standards
What is additive inverse? It means "opposite." Find out more about this concept in this detailed definition with examples and links to related terms.
Handout
University of Georgia

University of Georgia: Intermath Dictionary: Additive Inverse

For Students 3rd - 8th Standards
"What happens when you add opposite numbers together?" Understanding the additive inverse will help you to answer this questions. An explanation of additive inverse with examples and non-examples.