Unit Plan 2 (Grade 4 Math): Place Value to Millions—Value & Structure

Focus: Read, write, and interpret multi-digit numbers; explain that a digit in one place is ten times the value to its right.

Grade Level: 4

Subject Area: Mathematics (Place Value to Millions)

Total Unit Duration: 5 sessions (one week), 45–60 minutes per session

I. Introduction

This week deepens whole-number place value through the millions period. Students read, write, and interpret numbers in multiple forms, explain ten times/one-tenth relationships across places, and justify comparisons using precise language and representations.

Essential Questions

• How does the place of a digit determine its value?
• Why is a digit in one place ten times the value of the same digit to its right (and one-tenth of the value to its left)?
• How do we communicate large numbers clearly using periods, commas, and multiple forms?

II. Objectives and Standards

Learning Objectives — Students will be able to:

1. Read and write multi-digit whole numbers through the millions in standard, expanded, and word forms.
2. Explain and model that a digit in one place represents ten times what it represents in the place to its right (and one-tenth of the place to its left).
3. Compose and decompose numbers using place-value structure and justify comparisons using place reasoning.
4. Use representations (place-value charts, base-ten sketches, number lines) to support explanations.
5. Communicate with precision: correct commas, period names, and consistent vocabulary when presenting numbers.

Standards Alignment — CCSS Grade 4 (spiral across the unit)

• 4.NBT.1: Recognize that in a multi-digit whole number, a digit in one place represents ten times what it represents in the place to its right.
• 4.NBT.2: Read and write multi-digit whole numbers using base-ten numerals, number names, and expanded form; compare two multi-digit numbers using , , based on meanings of the digits in each place.
• Mathematical Practices (MP.1–MP.8) threaded throughout.

Success Criteria — Student Language

• I can read and write numbers to the millions in standard, expanded, and word form.
• I can explain ten times/one-tenth relationships between adjacent places using models or sentences.
• I can compare two numbers and justify my choice using place-value reasoning and precise vocabulary.
• I can use commas and period names correctly to make large numbers easy to understand.