Unit Plan
Science Education Resource Center at Carleton College

Serc: Math You Need: Rearranging Equations to Solve for a Given Variable

For Students 9th - 10th Standards
This tutorial guides students through the steps in rearranging science formulas to solve for different variables. Includes practice exercises based on a variety of formulas.
Lesson Plan
TeachEngineering

Teach Engineering: Physics of the Flying T Shirt

For Teachers 9th - 10th
Students are introduced to the physics concepts of air resistance and launch angle as they apply to catapults. This includes the basic concepts of position, velocity and acceleration and their relationships to one another. They use...
Unit Plan
PBS

Pbs: Solving Linear Inequalities With Negative Numbers

For Students 6th - 8th
Solve an inequality that has negative numbers and a variable. This video focuses on using inverse operations to solve for a variable and the importance of flipping the inequality when multiplying or dividing by a negative number.
Activity
Discovery Education

Discovery Education: Web Math: Solve a Linear Equation Involving One Unknown

For Students 9th - 10th Standards
This WebMath site explains how to enter your equation with one variable and solve for that variable. It explains step-by-step how to solve the equations and gives the final solutions.
Activity
Discovery Education

Discovery Education: Web Math: Solve a Set of Two Linear Equations

For Students 9th - 10th Standards
This WebMath site explains how to enter your two equations with two variables and solve for those variables. It explains step-by-step how to solve the equations and gives the final solutions.
eBook
Houghton Mifflin Harcourt

Holt, Rinehart and Winston: Homework Help Independent Practice: Solving Equations 1

For Students 9th - 10th Standards
Get independent practice determining if the variable value given is a solution for the equation. Each incorrect response gets a text box explanation and another try. Correct responses are confirmed.
Unknown Type
McGraw Hill

Glencoe: Self Check Quizzes 1 Solving Algebraic Equations

For Students 9th - 10th
Use Glencoe's randomly generated self-checking quiz to test your knowledge of solving algebraic equations. Each question has a "Hint" link to help. Choose the correct answer for each problem. At the bottom of the page click the "Check...
Lesson Plan
Scholastic

Scholastic: Solving the Unknown With Algebra

For Teachers 6th - 8th
Students will learn and reinforce skills for solving for unknowns, manipulating equations while keeping them in balance, using formulas to solve real-world challenges, and working with proportions, radicals and exponents.
Activity
TeachEngineering

Teach Engineering: The Balancing Act

For Teachers 6th - 8th
Students are given the opportunity to visualize and interact with concepts they have already learned, specifically algebraic equations and solving for unknown variables. Students construct a balancing seesaw system (LEGO Balance Scale)...
Lesson Plan
Better Lesson

Better Lesson: Variables

For Teachers 3rd Standards
Children will learn the term variable and then work to "attack" a problem using what they know about the relationship between multiplication and division to solve for an unknown.
Activity
Texas Instruments

Texas Instruments: Numb3 Rs: The Pythagorean Expectation

For Teachers 9th - 10th
Based off of the hit television show NUMB3RS, this interesting lesson has students use sabermetrics (the study of statistics in baseball) to determine the expected winning percentage for a team, given the runs scored and runs allowed....
Interactive
Calculator Soup

Calculator Soup: Fractions Solve for Unknown X

For Students 9th - 10th
Solve for an unknown value x with this fractions calculator. Find the missing fraction variable in the proportion using cross multiplication to calculate the unknown variable x. Solve the proportion between 2 fractions and calculate the...
Activity
Lawrence Hall of Science

The Math Page: Skill in Algebra: Algebraic Expressions

For Students 7th - 9th Standards
Here is a site that clearly and thoroughly explains many topics related to algebraic expressions. There are example problems solved, problems for the student to attempt, and answers to the student problems. Point this site out to...
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: A rei.b.4.a: Visualizing Completion of the Square

For Teachers 9th - 10th
The purpose of this visualization task is to help provide geometric intuition for the algebraic process called ''completing the square.'' Aligns with HSA-REI.B.4.a.
Interactive
University of Waterloo (Canada)

University of Waterloo: Math Frog: Solving Equations 3

For Students 6th - 8th
Race against the clock to see how many equations you can solve correctly in four minutes. For each equation, you will be given two variables, and you will solve for the third.
Activity
National Council of Teachers of Mathematics

Nctm: Figure This: Which Is Worth More, a Smile or a Frown?

For Students 3rd - 6th
Solve for the value of the smiles and frowns to find out how much a smile is worth, in this activity. A challenge that focuses on number sense, number combinations, and unknowns. Included are examples of how this skill is applied in real...
Unit Plan
Texas Education Agency

Texas Gateway: Solving Systems of Equations With Algebraic Methods

For Students 9th - 10th Standards
Given verbal and/or algebraic descriptions of situations involving systems of two-variable linear equations, the student will solve the system of equations by different methods.
Activity
Texas Instruments

Texas Instruments: Solving Rational Expressions

For Teachers 9th - 10th
Students will solve rational equations for unknown variables, use given information to create rational equations, and determine the relationship between rational expressions.
Unit Plan
CK-12 Foundation

Ck 12: Algebra: Distributive Property for Multi Step Equations

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] Students learn how to solve multi-step problems using the Distributive Property. Students examine guided notes, review guided practice, watch instructional videos...
Unit Plan
Lawrence Hall of Science

The Math Page: An Approach to Calculus: Limits

For Students 9th - 10th
Here is a site that clearly and thoroughly explains the concept of limits, including one-side limits, the limit of a function, and the definition of limit. There are example problems solved, problems for the student to attempt, and...
Unit Plan
Lawrence Hall of Science

The Math Page: Skill in Algebra: Linear Equations

For Students 9th - 10th Standards
Here is a site that clearly and thoroughly explains solving linear equations, from the basic form ax+b=c up through equations with variables on both sides and with parentheses. There are example problems solved, problems for the student...
Lesson Plan
Education Place

Houghton Mifflin: Eduplace: Lesson Plan: What Is It? Solving One Step Equation

For Teachers 6th - 8th
This site is a great place for lesson information on the concept of writing and solving one-step, one-variable, linear equations. Three other tabs are available besides the-What Is It? tab. They are Tips and Tricks, When Students Ask,...
Unknown Type
McGraw Hill

Glencoe: Self Check Quizzes 3 Solving Multiplication and Division Equations

For Students 9th - 10th
Use Glencoe's Math Course 3 randomly generated self-checking quiz to test your knowledge of solving multiplication and division equation. Each question has a "Hint" link to help. Choose the correct answer for each problem. At the bottom...
Interactive
Doina Popovici

Math Play: Two Step Equations Basketball Game

For Students 7th - 9th
Solve for the variable by playing this two-step equation game alone or with another student.