#### Type:

E-book, Lesson Plan

#### Description:

This lesson addresses the substitution method of solving systems of equations. The students are introduced to the method through the use of a "real-world" problem.

#### Subjects:

• Mathematics > General
• Mathematics > Algebra
• Mathematics > Equations
• Mathematics > Graphing
• Mathematics > Problem Solving

• Grade 6
• Grade 7
• Grade 8
• Grade 9
• Grade 10

#### Keywords:

Algebra Linear Equations Graphing

English

Members

#### License Deed:

Creative Commons Attribution 3.0

#### Collections:

None
Update Standards?

#### CCSS.Math.Content.HSA-CED.A.1: Common Core State Standards for Mathematics

Create equations and inequalities in one variable and use them to solve problems. Include equations arising from linear and quadratic functions, and simple rational and exponential functions.
Curriki Rating
On a scale of 0 to 3
3
On a scale of 0 to 3

This resource was reviewed using the Curriki Review rubric and received an overall Curriki Review System rating of 3, as of 2009-07-09.

#### Component Ratings:

Technical Completeness: 3
Content Accuracy: 3
Appropriate Pedagogy: 3

#### Reviewer Comments:

This first lesson on solving linear equations by substitute mentions the concept of packing (replacing a complicated expression by a simple variable). This is a useful and frequently used idea but I have not seen it mentioned before. ……………………………………………..………………………….…….…………….……………………………………….. This resource is part of a 8 week unit for an elementary Algebra class. The unit (Teaching Linear Equations through Running a Small Business ) covers linear equations, linear regression, and uses the simple economics of running a small business to illustrate the ideas. It requires the teacher to integrate the material with various skills, including use of the Internet and other technologies. It is an ambitious and ultimately rewarding undertaking. azeeza almehri
August 18, 2013

Thank you Whitney Cork
March 23, 2012

This lesson connects the substitution method of solving systems of linear equations to students' prior knowledge of the graphing method and of using substitution (or "packing") in Algebra. The lesson also provides opportunity to check student readiness at the beginning of the lesson. Motivation is provided through a real life example and well written guided questions allow for student discovery of a system of equations. There is also an opportunity to discuss the importance of learning a new method to solve systems of linear equations (because graphing is not always reasonable). Independent practice is provided after guided instruction is finished.

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