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.
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
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.
Unknown Type
Khan Academy

Khan Academy: Linear Equations With Unknown Coefficients

For Students 9th - 10th Standards
Solve a linear equation for a variable where the coefficients are represented by letters. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.
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: 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: Multi Step Equations With Like Terms

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] In this lesson, students learn how to solve multi-step equations by combining like terms. Students examine guided notes, review example problems, watch instructional...
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.
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)...
Unit Plan
CK-12 Foundation

Ck 12: Elem Math: Letter Replacement (Division)

For Students 3rd - 5th
[Free Registration/Login may be required to access all resource tools.] In this learning module, students must solve equations to find the value of one or more unknowns, then determine the value of another unknown using division....
Lesson Plan
Lesson Tutor

Lesson Tutor: Balancing One Step Equations

For Teachers 9th - 10th Standards
The lesson plan provided here gives a step-by-step set of instructions for balancing an equation in order to find the value of the unknown variable. After two examples are worked through, 10 practice problems are given, as well as their...
Unknown Type
Wyzant

Wyzant: Algebra Help

For Students 9th - 10th Standards
Heres a comprehensive review of the basics of algebra. WyzAnt includes lessons on varied topics, calculators that show step-by-step solutions, and interactive worksheets for practicing and testing your skills. Just choose a topic and use...
PPT
Sophia Learning

Sophia: Rhombi Practice Problems: Lesson 4

For Students 9th - 10th
This lesson will provide examples that use the characteristics of rhombi to solve for unknown variables, side lenths, and angle measures. It is 4 of 5 in the series titled "Rhombi Practice Problems."
PPT
Sophia Learning

Sophia: Segment Bisectors Problems: Lesson 1

For Students 9th - 10th Standards
This lesson will demonstrate how to solve for unknown variables and segment lengths in problems that involve midpoint and segment bisectors. It is 1 of 5 in the series titled "Segment Bisectors Problems."
PPT
Sophia Learning

Sophia: Triangle Proportionality Theorem: Lesson 4

For Students 9th - 10th Standards
This lesson presents how to apply the triangle proportionality theorem to solve for unknown variables and side lengths. It is 4 of 6 in the series titled "Triangle Proportionality Theorem."
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: A Ced, a Rei Basketball

For Teachers 9th - 10th Standards
In this task, two brothers track how many games they have each won. Learners are asked to make calculations based on the percentage of games won. They set up a rational equation (and a rational inequality) in one variable, and then solve...
Activity
Wyzant

Wyzant: Equation Calculator

For Students 9th - 10th
Students can input an equation and have the site solve it for them, complete with steps shown and explanations given along the way. Equations must be simple, first- or second-degree with only one variable. A quick list of rules to follow...
Activity
United Nations

Unesco: Algebra Review (In Arabic)

For Students 6th - 9th
This page, part of a larger UNESCO site on math and science education, has 15 basic, open- and multiple-choice algebra questions, with the correct answer immediately following the question. Entirely in Arabic.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: A ced.a.4: Equations and Formulas

For Teachers 9th - 10th Standards
In this exercise, learners will use inverse operations to solve the equations for the unknown variable, or for the designated variable if there is more than one. Aligns with A-CED.A.4.
Activity
Illustrative Mathematics

Illustrative Mathematics: 3.oa the Class Trip

For Teachers 2nd - 4th Standards
The purpose of this instructional task is for students to solve a two-step word problem and represent the unknown quantity with a variable. This task also addresses the concept of scarcity. Aligns with CCSS.Math.Content.3.OA.D.8 Solve...