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Activity
National Council of Teachers of Mathematics

The Math Forum: Ask Dr. Math: Square Roots and Irrational Numbers

For Students 9th - 10th Standards
Math Forum response to whether square roots of all non-perfect squares are irrational. Contains a proof showing that such cases are, indeed, irrational.
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Unknown Type
Education Place

Houghton Mifflin: Eduplace: Extra Practice Quiz Evaluate Expressions 2

For Students 3rd - 8th Standards
Practice evaluating expressions with rational numbers in them. Read the interactive quiz rules and then click on the "Begin" ticket. If you answer incorrectly you get one more chance to try again then you are told the correct answer. See...
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Activity
Texas Instruments

Texas Instruments: Number Sets

For Teachers 9th - 10th
When you start this activity, students receive a Venn diagram of real number sets (natural, whole, integer, rational, irrational)on their calculator. This same diagram is projected on the Activity Center screen at the front of the room....
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Unit Plan
National Institute of Educational Technologies and Teacher Training (Spain)

Ministerio De Educacion: Los Numerous Reales

For Students 9th - 10th Standards
In this module you will learn about rational and irrational numbers.
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Handout
Math Open Reference

Math Open Reference: Number

For Students 9th - 10th
Resource defines numbers into two main categories, counting numbers and scalars. It also gives examples of number notation.
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Activity
Texas Instruments

Texas Instruments: The Tortoise and the Hare

For Teachers 9th - 10th
In this activity, students develop patterns using two or more rational number quantities. They comprehend the concept of functions by understanding the relationship between these quantities and their sums.
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Lesson Plan
Alabama Learning Exchange

Alex: The Real Number System

For Teachers 6th - 8th Standards
This instructional activity focuses on a clear understanding of the real number system by using a variety of teaching strategies. A graphic organizer on a slideshow illustrates how the classifications of numbers relate. A kinesthetic...
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Unknown Type
Common Core Sheets

Common Core Sheets: The Number System 8.ns.2 Worksheets

For Teachers 8th Standards
Print or create worksheets to assess students' understanding of radicals, square roots, and irrational numbers.
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Website
PBS

Pbs Learning Media: Cyberchase: Competing for the Northern Hemisphere Games

For Students 6th - 8th
In this short Cyberchase video, students learn about positive and negative numbers as Harry tries to score a total of 50 points in various events to qualify for the Northern Hemisphere games in New Orleans. [3:24]
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Handout
CK-12 Foundation

Ck 12: Algebra: Number Lines Study Guide

For Students 9th - 10th Standards
This comprehensive study guide highlights the main terms and formulas needed to review number lines. Examples are included.
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Unknown Type
Khan Academy

Khan Academy: Addition & Subtraction: Find the Missing Value

For Students 7th
Practice finding the missing value in an addition or subtraction equation involving negative numbers.
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Unit Plan
PBS

Pbs: Logical Leaps: Fractions and Decimals From 0 to 1 on the Vertical Number Line

For Students 6th - 8th
In this interactive, use logic to solve riddles involving a flea-jumping contest. Place each contestant's jump, represented by either a fraction or a decimal in both feet and inches, at the correct point on the vertical number line....
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Unit Plan
PBS

Pbs: Logical Leaps: Graphing Inequalities: Fractions and Decimals From 0 to 1

For Students 6th - 8th
In this interactive, use logic to solve three riddles involving high-jump performers in a flea circus. Then, using knowledge of inequalities, place the fleas in the appropriate range on a vertical number line. Numbers are randomized so...
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Lesson Plan
University of Texas

Inside Mathematics: Decimals [Pdf]

For Teachers 4th - 6th Standards
This task challenges a student to use knowledge of place value system to represent and compare rational numbers.
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Unit Plan
Texas Education Agency

Texas Gateway: Selecting and Using Appropriate Operations to Solve Problems

For Students 7th - 8th Standards
Given problem situations involving rational numbers, the student will select and use appropriate methods to solve the problems.
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Website
PBS

Pbs Learning Media: Importance of the Origin

For Students 6th - 8th
The CyberSquad tries to rescue the Cyberchase Council, which is being held captive by Hacker in this video segment from Cyberchase.
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Unit Plan
Khan Academy

Khan Academy: Equations With Parentheses: Decimals & Fractions

For Students 7th - 8th
Solve linear equations that contain expressions with parentheses and the coefficients are rational numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
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Unit Plan
CK-12 Foundation

Ck 12: Positive and Negative Fraction and Decimal Comparison Grade 6

For Students 6th - 7th
[Free Registration/Login may be required to access all resource tools.] Compare and order positive and negative fractions and decimals.
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Unit Plan
CK-12 Foundation

Ck 12: Arithmetic:

For Students 8th - 9th
[Free Registration/Login may be required to access all resource tools.] Learn how to add integers.
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Interactive
Arcademics

Arcademics: Orbit Integers

For Students 5th - 7th
Select the correct answer by adding integers to advance your spacecraft.
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Interactive
Arcademics

Arcademics: Integer Warp

For Students 6th Standards
Idenitfy the correct answer based upon the given integer multiplication problem.
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Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: 7.ee Who Is the Better Batter?

For Teachers 7th Standards
Seventh graders compare the batting averages of two baseball players in this lesson plan.
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Whiteboard
ClassFlow

Class Flow: Squares and Square Roots

For Teachers 9th - 10th
[Free Registration/Login Required] Students complete multi-step computations using order of operations in situations involving combinations of rational numbers including whole number exponents and square roots of square numbers.
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Unit Plan
Cut the Knot

Cut the Knot!: Polygons: Formality and Intuition

For Students 9th - 10th
This is a very interesting site about polygons. The site begins by distinguishing between shapes whose sides intersect and polygons whose sides do not overlap. After this short introduction, you will find information regarding area and...

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