### Representing Situations of the Form and

#### Lesson 1

Relationships between Quantities#### Lesson 2

Reasoning about Contexts with Tape Diagrams (Part 1)#### Lesson 3

Reasoning about Contexts with Tape Diagrams (Part 2)#### Lesson 4

Reasoning about Equations and Tape Diagrams (Part 1)#### Lesson 5

Reasoning about Equations and Tape Diagrams (Part 2)#### Lesson 6

Distinguishing between Two Types of Situations

### Solving Equations of the Form and and Problems That Lead to Those Equations

#### Lesson 7

Reasoning about Solving Equations (Part 1)#### Lesson 8

Reasoning about Solving Equations (Part 2)#### Lesson 9

Dealing with Negative Numbers#### Lesson 10

Different Options for Solving One Equation#### Lesson 11

Using Equations to Solve Problems#### Lesson 12

Solving Problems about Percent Increase or Decrease

### Inequalities

#### Lesson 13

Reintroducing Inequalities#### Lesson 14

Finding Solutions to Inequalities in Context#### Lesson 15

Efficiently Solving Inequalities#### Lesson 16

Interpreting Inequalities#### Lesson 17

Modeling with Inequalities