## Table of Contents

- 1. CK-12 Algebra Explorations Concepts, Pre-Kindergarten
Comparing, identifying patterns, and using clues

- 2. CK-12 Algebra Explorations Concepts, Kindergarten
Comparing, proportional reasoning, finding patterns, making predictions, and inductive reasoning

- 3. CK-12 Algebra Explorations Concepts, Grade 1
Proportional reasoning, equality vs. inequality, variables, and mathematical relationships such as diagrams and tables

- 4. CK-12 Algebra Explorations Concepts, Grade 2
Proportional reasoning, equality vs. inequality, variables as unknowns, and patterns of geometric shapes

- 5. CK-12 Algebra Explorations Concepts, Grade 3
Proportional reasoning, variables, using equations to solve problems, and making and interpreting tables for functions

- 6. CK-12 Algebra Explorations Concepts, Grade 4
Writing and solving equations, functions and function tables, and interpreting maps and graphs

- 7. CK-12 Algebra Explorations Concepts, Grade 5
Distributive property, describing patterns, functions to represent data, problem-solving strategies, and formulas for area and perimeter

- 8. CK-12 Algebra Explorations Concepts, Grade 6
Order of operations, writing equations to represent relationships, using formulas, and interpreting line graphs

- 9. CK-12 Algebra Explorations Concepts, Grade 7
Order of operations and the distributive property, the distance formula, systems of equations, and interpreting diagrams and graphs