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Activity
J Coffman

Joseph Coffman's Lecture Notes: Solving Systems of Equations Algebraically

For Students 9th - 10th Standards
The lesson explores solving systems of equations algebraically. Topics discussed are the elimination method, substitution method, addition property, and special cases. Examples with detailed solutions and an assessment are included.
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Website
Other

Cambridge University: Color Perception Tutorial

For Students 9th - 10th
This helpful tutorial on color perception is divided into sections including our eyes and vision, additive and subtractive color mixing, hue and saturation, and color properties.
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Unit Plan
Khan Academy

Khan Academy: Math Patterns 1

For Students 2nd - 4th Standards
Identify arithmetic patterns (including ones in the addition or multiplication tables), and explain them using properties of operations. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a...
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Handout
Simon Fraser University

Chem1 Virtual Textbook: Kinetic Molecular Model

For Students 9th - 10th
The General Chemistry Virtual Textbook, or Chem 1, is broken into several sections covering various aspects of topics related to chemistry. This section deals with the basic components of the Kinetic-Molecular Theory in addition to...
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Graphic
Math Medics

S.o.s. Math: Hyperbolic Functions

For Students 9th - 10th Standards
This math lesson gives formulas for the hyperbolic trigonometric functions, a very most important property of their version of the Pythagorean Theorem, and it's verification, and many helpful visual aides.
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Website
NOAA

Noaa: Crabeater Seals

For Students 3rd - 8th
This complete site offers several really cool facts about the crabeater seal. In addition, a link takes you to more information about this seal such as where do they live, what do they eat, how long do they live and more.
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Activity
Duke University

Duke University: Web Feats Ii: Altitude Theorem for Equilateral Triangles

For Students 9th - 10th
This resource provides information about the altitude theorem for equilateral triangles, in addition to links on related topics. Requires Java.
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G Mg Solar Eclipse

For Teachers 9th - 10th Standards
In this task, students investigate why total solar eclipses are rare. They will learn that, in addition to requiring the positioning of the Sun, Moon, and Earth, the Moon can only completely block out the Sun when it is closest to the...
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Lesson Plan
Better Lesson

Better Lesson: Math Centers Review Previous Skills

For Teachers K Standards
Students will be able to independently practice graphing, teen numbers, and addition.
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Activity
K-5 Math Teaching Resources

K 5 Math Teaching Resources: Turn Around Dominoes [Pdf]

For Students 1st - 3rd Standards
Write addition number sentences using the commutative property.
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Activity
Lawrence Hall of Science

The Math Page: Skill in Algebra: Some Rules of Algebra

For Students 9th - 10th
Here is a site that clearly and thoroughly explains many rules of algebra, such as the commutative property and the addition property of equality. There are example problems solved, problems for the student to attempt, and answers to the...
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: Make 9

For Teachers K - 1st Standards
Students will make 9 in as many ways as they can by adding two numbers between 0 and 9. This is a good introduction to the commutative property.
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: Counting Dots in Arrays

For Teachers 2nd - 3rd Standards
This task aims to show learners that there is often more than one way to represent a quantity. This lesson also lays a foundation for students to understand the commutative property of multiplication.
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: Fact Families

For Teachers 1st - 2nd Standards
As a whole class, the teacher presents students with 3 numbers on cards, such as 5, 8, and 3. The teacher asks the students to find all the ways the numbers can be put together in addition or subtraction sentences. This lesson includes...
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Activity
Help Algebra

Help algebra.com: Getting Rid of Parentheses

For Students 9th - 10th
Resource explains how to simplify several types of expressions that contain expressions using the properties of addition and multiplication and applying the properties with the order of operations.
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Unit Plan
Saddleback College

Algebra2 Go: Prealgebra

For Students 9th - 10th Standards
The resource consists of comprehensive learning tools such as class notes, video lectures, and templates through which students can review prealgebra topics.
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Lesson Plan
Better Lesson

Better Lesson: Introduction to Solving Equations

For Teachers 6th Standards
Sixth graders work with the concept of equality and balance to solve one and two-step algebraic equations.
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Unit Plan
Khan Academy

Khan Academy: Equivalent Expressions With Negative Numbers

For Students 6th - 8th Standards
Practice identifying equivalent expressions involving the addition and subtraction of negative numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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Activity
University of Saskatchewan (Canada)

University of Saskatchewan: Inequalities

For Students 9th - 10th
This University of Saskatchewan looks at the basic rules of solving inequalities, concentrating on inequalities with absolute values. Includes example problems and exercises with their solutions.
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: 5.md,oa You Can Multiply Three Numbers in Any Order

For Teachers 5th Standards
The purpose of this task is for students to use the volume of a rectangular prism to see why you can multiply three numbers in any order you want and still get the same result. Aligns with 5.OA.A and 5.MD.C.5.
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Activity
Math Medics

S.o.s. Math: Order of Operations

For Students 9th - 10th Standards
This lesson contains four rules on order of operations and several examples of each. It also allows you to work out practice problems.
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Handout
Science Struck

Science Struck: Adding Exponents

For Students 9th - 10th Standards
Explains how to add exponents as well as other aspects of exponents including positive and negative exponents, rational exponents, zero exponents, power of power, and division of exponents. Includes practice problems with answers provided.
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Handout
Science Struck

Science Struck: Uses of Calcium Chloride

For Students 9th - 10th
Learn about some uses of calcium chloride as a food additive, as a drying agent, for de-icing, in concrete mixes, and for its exothermic properties.
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Whiteboard
ClassFlow

Class Flow: Trigonometric Functions

For Teachers 9th - 10th Standards
[Free Registration/Login Required] After a quick review of properties in Algebra- addition property of equality and multiplication property of equality- students are guided through all solutions using numerous strategies including back...

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