Eliminate a color by dragging shapes. The interactive provides a graphical color display that allows for pupils to solve a linear system by elimination. Learners combine figures following set rules for positive and negative shapes. The procedure eliminates one shape color, leaving one equation in one variable to solve.

Concepts

systems of equations, systems of linear equations, elimination method, substitution

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Additional Tags

math

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Instructional Ideas

• Have class members write the equations for each step the interactive models

Classroom Considerations

• This is one interactive of two that use the same method
• Must sign up for a free CK-12 account to gain access

Pros

• Contains a description of what happens when a positive and a negative combine
• Viewers can see the correct answer if they give the wrong one

Cons

• None

Common Core

8.EE.C.8.a 8.EE.C.8.b HSA-REI.C.6