## Standards

Standard |
Language |

A.CED.1 |
Create equations and inequalities in one variable and use them to solve problems. |

A.CED.3 |
Represent constraints by equations or inequalities and by systems of equations and /or inequalities, and interpret solutions as viable or non-viable options in a modeling context. |

A.CED.4 |
Rearrange formulas to highlight a quantity of interest, using the same reasoning as in solving equations. |

A.REI.1 |
Explain each step in solving a simple equation as following from the equality of numbers asserted at the previous step, starting from the assumption that the original equation has a solution. Construct a viable argument to justify a solution method. |

A.REI.3 |
Solve linear equations and inequalities in one variable, including equations with coefficients represented by letters. |

## The “Story” of This Unit

Our world has balance, well it should, and we learn about equality through the balance of equal and opposites. Learning to solve an equation or an inequality is understanding balance and equal opposites. We can use equations and inequalities to solve for things we don’t know yet based on the simple premise that the two sides are balanced. We will expand and generalize on some common truths we will learn throughout the unit.

## Resources

### Blocks and Bags (Progression to Understanding)

Bags and Blocks Task examples### Free Online Resources

- http://www.learner.org/courses/learningmath/algebra/session6/part_c/index.html (Flash Required)
- Balance Beams Interactive http://www.hoodamath.com/mobile/games/algebrabalanceequations.html
- Balancing Scales Day 1 (used with permission by Nancy Ku)
- Balancing Scales Day 2 (used with permission by Nancy Ku)