In this task, 6th graders are presented with a large square divided into 9 squares and the center square is then removed. They are asked to find the area of the 8 remaining squares. Each smaller square is divided in the same way and the...

[Free Registration/Login may be required to access all resource tools.] Understand and solve problems with exponents. In addition, links above this content lead to extended explanations, videos, and practice using exponents.

A Distribution Collusion: Obtaining the secrets to successfully using the distributive property.

This tutorial shows two different ways in which you can simplify complex fractions. Works through examples step-by-step and gives some practice problems.

Part of H.W. Fowler's classic text on the use and misuse of the English language, "The King's English" (1908) section on prepositions focuses on their idiomatic nature. A comprehensive but a bit outdated manual, "The King's English"...

Explains how to simplify algebraic expressions by combining like terms. Provides numerous examples.

The purpose of this game is to help students think flexibly about numbers and operations and to record multiple operations using proper notation. Aligns with 5.OA.A.1.

At this website from Math2.org you will find tables with information about number words, meanings, and the symbols used to express them. At the very bottom there is also a Java Base Conversion Calculator.

Giving numerical values for physical quantities and equations for physical principles allows us to understand nature much more deeply than does qualitative description alone. To comprehend these vast ranges, we must also have accepted...

Through a variety of activities, students learn that not all acid and base reactions go to completion, and instead, they establish equilibrium. Acid-base equilibrium expressions have their own constants, ka and kb. Students will perform...

At this one page site you can work through step by step a sample problem that illustrates the problem solving strategy for "Write a number sentence." The answer is right there to help you check your thinking.

Solve equations that have one rational expression whose numerator and denominator are polynomial expressions. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.

[Free Registration/Login may be required to access all resource tools.] Identify and apply the commutative and associative properties of multiplication in fraction operations with numerical and variable expressions.

In this task about canoeing, paddling speed, and current speed, students examine how long a trip would take at different speeds. They write a function equation, graph their equation, and explain their thinking. The primary purpose of the...

Try to find the numerical pattern to describe what happens when Dan runs stairs. This interactive lesson focuses on using what you know about pattern recognition and using data to write expressions in order for you to figure out the...

Practice solving more challenging problems using the order of operations. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.