Illustrative Mathematics
Illustrative Mathematics: 8.ee How Many Solutions?
Eighth graders are given a linear equation and instructed to find a second linear equation in order to make a system of equations that fits different criteria related to its possible solutions. Aligns with 8.EE.C.8.
Illustrative Mathematics
Illustrative Mathematics: 8.ee Fixing the Furnace
In this task, 8th graders examine the fee structures for three furnace-repair companies to determine which one offers the best deal. They need to support their reasoning with equations, tables, and/or graphs. Aligns with 8.EE.C.8.
Illustrative Mathematics
Illustrative Mathematics: 8.ee Cell Phone Plans
For this task, 8th graders examine the fee structures and features of three cell phone plans to highlight the advantages of each. They will need to write linear equations and draw graphs for each. They then choose the best plan for a...
Illustrative Mathematics
Illustrative Mathematics: 8.ee Folding a Square Into Thirds
This exercise begins with students folding a square piece of paper according to directions and aligning it on a coordinate grid. They then must find and solve a pair of linear equations which can be used to understand how to fold a piece...
Illustrative Mathematics
Illustrative Mathematics: 8.ee Kimi and Jordan
This task looks at the job earnings plus weekly allowances of two people, all of which is saved. Students are asked complete tables showing their savings, write equations, draw their graphs, and compare the amounts they save each week....
Khan Academy
Khan Academy: Algebra: Equivalent Systems of Equations
Determine whether a couple of given systems of equations are equivalent or not to a third given system. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.