Texas Instruments
Texas Instruments: Patterns, Functions, and Algebraic Reasoning
Students learn to use the calculator to generate recursive patterns. They explore the connection from patterns to functions and algebraic reasoning. Students examine the idea of a variable for an unknown quantity and express mathematical...
Discovery Education
Discovery Education: Web Math: Crunch a Numerical Expression With Variables
Use this "math solver" to help you understand and evaluate any numerical expression, including those that involve variables. Simply type your expression in, and allow this website to provide step-by-step instructions on how to evaluate...
McGraw Hill
Glencoe: Self Check Quizzes 3 Variables, Expressions and Properties
Use Glencoe's Math Course 3 randomly generated self-checking quiz to test your knowledge of variables, expressions and properties. Each question has a "Hint" link to help. Choose the correct answer for each problem. At the bottom of the...
Sophia Learning
Sophia: Explanatory and Response Variables: Lesson 2
This lesson will explain explanatory and response variables. It is 2 of 3 in the series titled "Explanatory and Response Variables."
Other
Jeff Miller: Earliest Uses of Symbols for Variables
This personal site explains how variables began and who were the first to use them.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Variables
Find a quick, concise explanation of what variables are. An example is given and clearly explained.
Khan Academy
Khan Academy: Ordering Negative Number Expressions
Practice solving challenging negative number addition and subtraction problems. Number line models, variables, and absolute value come together to push your knowledge of negative numbers even deeper (maybe even below zero!). Students...
Khan Academy
Khan Academy: Factors & Divisibility
Students practice multiple-choice problems with factors and divisibility.
Khan Academy
Khan Academy: Polygenic Inheritance and Environmental Effects
Learn about traits that are controlled by multiple genes and/or influenced by the environment. Understand penetrance and expressivity.
Student Achievement Partners
Illustrative Mathematics: Fishing Adventures [Pdf]
Students use a model to define variables, write expressions, create an inequality and then interpreting the results in this lesson.
CK-12 Foundation
Ck 12: Algebra: Single Variable Expressions
[Free Registration/Login may be required to access all resource tools.] Use variable expressions to describe and solve real-world dilemmas.
CK-12 Foundation
Ck 12: Algebra: Simplify Variable Expressions
[Free Registration/Login may be required to access all resource tools.] Evaluate and simplify variable expressions that involve integer addition
Khan Academy
Khan Academy: Practice: Writing Basic Expressions With Variables
Practice writing basic algebraic expressions to match verbal descriptions of mathematical operations. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Evaluating Expressions With Two Variables
Practice evaluating expressions in two variables by plugging in values for the variables. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Khan Academy
Khan Academy: Evaluating Expressions With Variables Word Problems
In this exercise, students practice writing expressions with variables. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
CK-12 Foundation
Ck 12: Algebra: Products and Quotients of Variable Expressions
[Free Registration/Login may be required to access all resource tools.] Simplify variable expressions involving multiplication and division.
CK-12 Foundation
Ck 12: Algebra: Numerical Expression Evaluation
[Free Registration/Login may be required to access all resource tools.] In this lesson students use given values to evaluate variable expressions. Students examine guided notes, review guided practice, watch instructional videos and...
CK-12 Foundation
Ck 12: Algebra: Mathematical Expressions
[Free Registration/Login may be required to access all resource tools.] Use key words from verbal phrases to write variable expressions
Khan Academy
Khan Academy: Evaluating Expressions With Two Variables: Fractions and Decimals
Practice evaluating expressions in two variables by plugging in values for the variables. These problems include some fractions and decimals. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch...
Khan Academy
Khan Academy: Writing Basic Expressions With Variables
In this exercise, students practice writing basic algebraic expressions word problems. Students receive immediate feedback and have the opportunity to get hints and try questions repeatedly.
Khan Academy
Khan Academy: Evaluating Expressions With One Variable
Practice plugging in a value for the variable in an equation. These are introductory problems, so the expressions aren't too complicated. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a...
Khan Academy
Khan Academy: Evaluate Expressions Using Structure
Given some information about several unknown variables, rewrite and simplify the structure of an expression containing those variables. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a...
CK-12 Foundation
Ck 12: Algebra: Evaluate Numerical, Variable Expressions With Powers
[Free Registration/Login may be required to access all resource tools.] In this lesson students evaluate numerical and variable expressions involving powers. Students can watch a video tutorial, explore guided notes and attempt practice...
Khan Academy
Khan Academy: Manipulate Expressions Using Structure
Rewrite an expression containing two unknown variables by choosing a given equation that is equivalent. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.