8.EE.C.8b

Solve systems of two linear equations in two variables algebraically, and estimate solutions by graphing the equations. Solve simple cases by inspection. For example, 3x + 2y = 5 and 3x + 2y = 6 have no solution because 3x + 2y cannot simultaneously be 5 and 6.

 
47 Lesson(s)
   

Solving Linear Systems of Equations with Elimination (Day 1 of 3)

Algebra I » Unit: Systems of Linear Equations
Algebra I » Unit: Systems of Linear Equations
Noelani Davis
Washington, DC
Environment: Urban
 
Big Idea:

Students will identify zero pair coefficients to solve systems of equations by adding.

 
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Resources (14)
 
Reflections (1)
elimination 1
   

Systems Assessment 1: Scavenger Hunt

8th Grade Math » Unit: Systems of Linear Equations
8th Grade Math » Unit: Systems of Linear Equations
Mauricio Beltre
Orlando, FL
Environment: Urban
 
Big Idea:

Students move about in a scavenger hunt, solving systems using different algebraic methods.

 
Favorites (47)
 
Resources (19)
scavenger hunt
   

Stacking Cups: Systems of Equations Real World Application

Algebra I » Unit: Systems of Linear Equations
Algebra I » Unit: Systems of Linear Equations
Noelani Davis
Washington, DC
Environment: Urban
 
Big Idea:

Students use data to create equations describing a concrete scenario. Students analyze the equations as a system to solve a problem.

 
Favorites (86)
 
Resources (30)
 
Reflections (5)
stacking cups
   

Systems Assessment 2: Mastery Test

8th Grade Math » Unit: Systems of Linear Equations
8th Grade Math » Unit: Systems of Linear Equations
Mauricio Beltre
Orlando, FL
Environment: Urban
 
Big Idea:

Assess what students have learned about systems, and find where they may still need help conceptually.

 
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Resources (7)
 
Reflections (1)
systems assessment day2 image
   

Elimination 1 - add or subtract only

8th Grade Math » Unit: SYSTEMS OF LINEAR EQUATIONS
8th Grade Math » Unit: SYSTEMS OF LINEAR EQUATIONS
Jeff Li MTP
New York, NY
Environment: Urban
 
Big Idea:

Why does elimination work? Use sensitive nieces, peppermint bark, and gingerbread men to illustrate this mathematical concept.

 
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Resources (12)
5 7 image
   

Baseball Helmets Day 1 of 2

8th Grade Math » Unit: Solving Simultaneous Linear Equations
8th Grade Math » Unit: Solving Simultaneous Linear Equations
Christa  Lemily
Bowling Green, KY
Environment: Suburban
 
Big Idea:

Connect solving systems of equations to real life baseball helmets and reading tables to find the equations for solving by substitution.

 
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Resources (9)
 
Reflections (1)
baseball helmets lesson image
   

Elimination 4 - multiply one equation only

8th Grade Math » Unit: SYSTEMS OF LINEAR EQUATIONS
8th Grade Math » Unit: SYSTEMS OF LINEAR EQUATIONS
Jeff Li MTP
New York, NY
Environment: Urban
 
Big Idea:

More practice! Get kids fluent in solving systems using elimination... and push them to begin thinking about which method works best in different situations.

 
Favorites (6)
 
Resources (13)
5 9 image
   

Systems and Parallel Lines

8th Grade Math » Unit: Systems of Linear Equations
8th Grade Math » Unit: Systems of Linear Equations
Mauricio Beltre
Orlando, FL
Environment: Urban
 
Big Idea:

Systems having 0, 1, or infinitely many solutions correspond to lines not intersecting, intersecting once, or being coincident.

 
Favorites (5)
 
Resources (18)
 
Reflections (2)
systems resized
   

Choose the best method to solve systems of equations

8th Grade Math » Unit: SYSTEMS OF LINEAR EQUATIONS
8th Grade Math » Unit: SYSTEMS OF LINEAR EQUATIONS
Jeff Li MTP
New York, NY
Environment: Urban
 
Big Idea:

Choose wisely, my friend. Get kids to get meta about which method to use when solving systems of linear equations.

 
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Resources (16)
 
Reflections (1)
5 12 image choose wisely
   

Mixed Review of Systems of Equations

8th Grade Math » Unit: SYSTEMS OF LINEAR EQUATIONS
8th Grade Math » Unit: SYSTEMS OF LINEAR EQUATIONS
Jeff Li MTP
New York, NY
Environment: Urban
 
Big Idea:

Consolidate and review! I love this lesson because it has so many different ways of asking about systems of linear equations.

 
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Resources (12)
5 18 image resized
   

Real-life Systems 1

8th Grade Math » Unit: SYSTEMS OF LINEAR EQUATIONS
8th Grade Math » Unit: SYSTEMS OF LINEAR EQUATIONS
Jeff Li MTP
New York, NY
Environment: Urban
 
Big Idea:

How can we use systems of linear equations in real-life systems? Get kids to understand the "break-even" point and apply algebra to the real world.

 
Favorites (9)
 
Resources (16)
 
Reflections (1)
5 13 image resized
   

Real-life Systems 3 - Easy Price

8th Grade Math » Unit: SYSTEMS OF LINEAR EQUATIONS
8th Grade Math » Unit: SYSTEMS OF LINEAR EQUATIONS
Jeff Li MTP
New York, NY
Environment: Urban
 
Big Idea:

Introduce students to the idea of using the concept of systems to solve situations with two unknowns. Confidence builder!

 
Favorites (1)
 
Resources (15)
 
Reflections (1)
5 15 image resized
   

Real-life Systems 5 - Price-Sum Plus One Other

8th Grade Math » Unit: SYSTEMS OF LINEAR EQUATIONS
8th Grade Math » Unit: SYSTEMS OF LINEAR EQUATIONS
Jeff Li MTP
New York, NY
Environment: Urban
 
Big Idea:

Get deep into algebraic thinking by solving problems that aren't so straightforward. A tricky one pushes kids to think algebraically.

 
Favorites (2)
 
Resources (12)
5 17 image resized
   

Graphing Linear Systems of Equations (Day 1 of 2)

Algebra I » Unit: Systems of Linear Equations
Algebra I » Unit: Systems of Linear Equations
Noelani Davis
Washington, DC
Environment: Urban
 
Big Idea:

Students will discover that intersecting lines on a coordinate plane share a common solution, forming a system of equation.

 
Favorites (48)
 
Resources (25)
 
Reflections (1)
300px linear function graph svg
   

Solving Linear Systems of Equations with Elimination (Day 3 of 3)

Algebra I » Unit: Systems of Linear Equations
Algebra I » Unit: Systems of Linear Equations
Noelani Davis
Washington, DC
Environment: Urban
 
Big Idea:

Students will use multiplication to create zero pair coefficients. Students will use graphing calculators to verify the solution to a system of equations.

 
Favorites (20)
 
Resources (18)
 
Reflections (1)
elimination 3
Common Core Math
 
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