Unit 1: Number Concepts, Addition, Subtraction, and Graphing

• Lesson 1.3: Social Studies Connection
• Lesson 2.3: Social Studies Connection
• Lesson 2.7: Social Studies Connection
• Lesson 3.4: Music Connection

Unit 3: Geometry and Fractions

• Lesson 7.8: Social Studies Connection
• Lesson 8.5: Art Connection
• Lesson 9.5: Social Studies Connection

Unit 4: Adding Two-Digit Numbers

• Lesson 10.3: Social Studies Connection
• Lesson 11.5: Social Studies Connection

Unit 5: Subtracting Two-Digit Numbers

• Lesson 13.3: Social Studies Connection
• Lesson 13.6: Science Connection

Unit 6: Money and Time

• Lesson 14.3: Social Studies Connection
• Lesson 14.6: Social Studies Connection
• Lesson 15.8: Social Studies Connection
• Lesson 16.4: Science Connection

Unit 7: Measurement

• Lesson 17.8: Science Connection
• Lesson 18.8: Science Connection

Unit 8: Numbers and Operations Through 1,000, Multiplication, and Division

• Lesson 19.9: Science Connection
• Lesson 20.9: Science Connection
• Lesson 21.3: Social Studies Connection
• Lesson 22.3: Science Connection