National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Adding and Subtracting Inequaliites
"Dr. Math" provides an explanation on remembering when inequalities may be added and subtracted. The explanation is in response to a question submitted by a student.
Bill of Rights Institute
Bill of Rights Institute: Founders Quotes
Liberty must at all hazards be supported. We have a right to it, derived from our Maker. But if we had not, our fathers have earned and bought it for us, at the expense of their ease, their estates, their pleasure, and their blood. -...
Bill of Rights Institute
Bill of Rights Institute: Founding Principles
Below, you will find suggested definitions of each principle. Click here to read the words of James Madison, a primary contributor to the Constitution, and other Founders on these principles.
National Women’s History Museum
National Women's History Museum: The 14th and 15th Amendments
Information on the passage of the 14th and 15th amendments that helped to transform the women's rights movement.
Khan Academy
Khan Academy: The Effects of Ear Canal Acoustics on Hearing Ability
This is a five-question quiz related to the passage "The Effects of Ear Canal Acoustics on Hearing Ability."
Math Open Reference
Math Open Reference: Kite
Learn about kites with this handy reference guide. Provides a detailed definition and an interactive activity that enhances further explanation. Includes links to related topics.
CK-12 Foundation
Ck 12: Algebra: One Step Equations and Inverse Operations
[Free Registration/Login may be required to access all resource tools.] In this lesson students solve equations involving addition and subtraction. Students examine guided notes, review guided practice, watch instructional videos and...
CK-12 Foundation
Ck 12: Algebra: One Step Equations and Inverse Operations
[Free Registration/Login may be required to access all resource tools.] In this lesson students learn how to solve one-step equations. Students examine guided notes, review guided practice, watch instructional videos and attempt practice...