Primary Resources
Primary Resources: General Multiplication and Division
A huge collection of teacher resources in basic multiplication and division. Information on multiplication as repeated addition and division as repeated subtraction. Includes worksheets, games, PowerPoint presentations, smartboard...
University of South Florida
Educational Technology Clearinghouse: Lit2 Go: Lewis Carroll: Symbolic Logic
The text of a book "discussing the area of mathematics which studies the purely formal properties of strings of symbols." The text can be read online or downloaded by individual chapters in MP3 or PDF format. In addition, each chapter...
Better Lesson
Better Lesson: Introduction to Solving Equations
Sixth graders work with the concept of equality and balance to solve one and two-step algebraic equations.
AAA Math
Aaa Math: Complete a Numerical Sentence Subtraction
Students can practice solving subtraction equations through these interactive learning exercises. Three games are also available to challenge students' understanding of the skill.
Science Struck
Science Struck: Adding Exponents
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.
Alabama Learning Exchange
Alex: Mix It Up!
By now, students have learned that fact families include both addition and subtraction facts. They have also learned that by reversing the order of the addends, they can form related addition facts with the same sum. The students will...
Duke University
Duke University: Web Feats Ii: Altitude Theorem for Equilateral Triangles
This resource provides information about the altitude theorem for equilateral triangles, in addition to links on related topics. Requires Java.
Common Core Sheets
Common Core Sheets: Finding Opposites [Pdf]
This site provides worksheets covering the concept of finding opposites also know as additive inverses. There are ten worksheets and each has an answer key. All files are grouped together as a pdf file.
McGraw Hill
Mc Graw Hill: The Additive Inverse Property
The sum of any number and its additive inverse is always a zero. This site gives you the rule for this property.
Washington State University
Washington State University: Order of Operations
Washington State University provides a short lesson concerning which operations to execute first in solving an equation. The site provides the answers with an example.
Khan Academy
Khan Academy: Equivalent Expressions With Negative Numbers
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.
Illustrative Mathematics
Illustrative Mathematics: G Mg Solar Eclipse
In this task, young scholars 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...
Khan Academy
Khan Academy: Equivalent Expressions With Negative Numbers and Variables
Practice equivalent expressions with negative numbers and variables.
Khan Academy
Khan Academy: Intro to Zero Matrices
Explains what a zero matrix is, shows examples, and provides some interactive practice exercises. Help is available for exercises if it is needed. A summary chart compares the number zero to the zero matrix.
TeachEngineering
Teach Engineering: Surface Tension Lab
Students extend their understanding of surface tension by exploring the real-world engineering problem of deciding what makes a "good" soap bubble. Student teams first measure this property, and then use this measurement to determine the...