Third grade uses Pearson’s Investigations math program. It focuses on helping students make sense of mathematics in meaningful ways, and learn that they can be mathematical thinkers. Investigations’ areas of concentration include computational fluency with whole numbers as a major goal. Areas of focus include rational numbers, geometry, measurement, data, and early algebra. This program is rich with content, and emphasizes reasoning about mathematical ideas. Individual lessons engage a wide range of learners by design and meet the needs of students who learn in different ways.

Unit 1- Addition, Subtraction, and the Number System 1

• Understanding the equivalence of one group and the units that comprise it
• Adding and subtracting accurately and efficiently

Unit 2- Data Analysis

• Describing, summarizing, and comparing data
• Representing data
• Designing and carrying out a data investigation
• Measuring with standard units

Unit 3- Addition, Subtraction, and the Number System 2

• Extending knowledge of the number system to 1,000
• Understanding the equivalence of one group and the discrete unit that comprise it
• Adding and subtracting accurately and efficiently
• Understanding different types of subtraction problems

Unit 4- 2-D Geometry and Measurement

• Measuring with standard units
• Understanding and finding perimeter
• Understanding and finding area
• Describing and classifying 2-dimensional figures
• Describing and measuring angles

Unit 5- Multiplication and Division

• Understanding the meaning of multiplication
• Reasoning about numbers and their factors and multiples
• Understanding and working with an array model of multiplication
• Learning the multiplication combinations with products up to 50 fluently
• Developing strategies for division based on understanding the inverse relationship between multiplication and division

Unit 6- Patterns, Functions, and Change

• Using graphs to represent change
• Using tables to represent change
• Describing and representing a constant rate of change
• Constructing, describing, and extending number sequences with constant increments generated by various contexts
• Understanding temperature and measuring with standard units

Unit 7- Fractions and Decimals

• Understanding the meaning of fractions and decimal fractions as equal parts of a whole
• Using representations to combine fractions

Unit 8- Addition, Subtraction, and the Number System 3

• Adding and subtracting accurately and efficiently
• Describing, analyzing, and comparing strategies for adding and subtracting whole numbers

Unit 9- 3-D Geometry and Measurement

• Describing properties of 3-dimensional shapes
• Translating between 2-dimensional and 3-dimensional shapes
• Structuring rectangular prisms and determining their volume