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Khan Academy

Khan Academy: Systems of Equations With Elimination Challenge

For Students 9th - 10th Standards
Solve systems of equation with multi-step elimination (e.g., a manipulation is needed in order for x-values or y-values to cancel each other out).
Lesson Plan
University of Texas

Inside Mathematics: Cindy's Cats [Pdf]

For Teachers 4th - 6th Standards
This task challenges a student to use knowledge of fractions to solve one and multi-step problems with fractions.
Unit Plan
Khan Academy

Khan Academy: Equations With Parentheses: Decimals & Fractions

For Students 7th - 8th
Solve linear equations that contain expressions with parentheses and the coefficients are rational numbers. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video or receive hints.
Activity
Wyzant

Wyzant: Combining Like Terms Worksheet

For Students 9th - 10th Standards
Ten multi-step linear equations are provided here from WyzAnt in an inter-active format for students to use to quiz themselves. Students enter their answers and the site grades it for them.
Activity
Lesson Tutor

Lesson Tutor: A Beginning Look at Basic Algebra

For Students 9th - 10th Standards
Twelve lessons are provided as an introduction to basic algebra. Each covers the topic clearly, providing examples with explanations as well as practice problems and their solutions for the user. Topics highlighted here include: solving...
Lesson Plan
PBS

Pbs Teachers: Sports and Math: Batting Averages and More

For Teachers 9th - 10th Standards
Set up a spreadsheet using a computer or graphing calculator, and perform calculations using columns. Calculate percentages and solve a system of equations regarding baseball statistics.
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: 7.rp Two School Dance

For Teachers 6th - 8th
The purpose of this task is to see how well middle schoolers students understand and reason with ratios. This task was adapted from problem #14 on the 2011 American Mathematics Competition (AMC) 8 Test. Aligns with 7.RP.A.3. The site...
Unit Plan
CK-12 Foundation

Ck 12: Algebra: Checking Solutions to Inequalities

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] On this site students learn to verify that solutions to inequalities are correct. Students can watch video tutorial, look at key vocabulary and attempt practice...