3rd Grade

Here are all the units that your child will be studying in math in their third grade year. Consult with your child's teacher to learn what unit your child is working on at any given time.

Unit 1: Three-Digit Numbers Place Value, Addition, and Subtraction

  • Rounding numbers can be useful when estimating. Knowing how to round will help students with addition and subtraction.

  • Students can use what they know about place value to add or subtract using partial sums or differences and other strategies.

Unit 2: Multiplication and Division concepts, relationships, and patterns

  • Multiplication is a way of combining equal groups. Knowing how to work with equal groups will help students with both multiplication and division problems.

  • There are many models and strategies to help students multiply. Knowing these strategies, such as breaking apart factors, will help make students more fluent with their multiplication facts.

  • Numbers can be multiplied in any order. Students can also use place value to multiply.

  • Division means separating a total number of objects into equal-sized groups. Knowing how to divide will help students find the number of groups or the number of items in a group.

Unit 3: Multiplication Finding Area, Solving Word PRoblems, and Using Scaled Graphs

  • Area is the measure of the space inside a shape.

  • Students can use what they know about multiplication to find the area of a rectangle. They can add areas to find the area of complex shapes.

  • Students can use what they know about arrays to help them model and solve multiplication and division problems.

  • The scale on a graph can be greater than 1. Knowing how to multiply will help students use scale to solve problems about data more efficiently.

Unit 4: Fractions Equivalence and Comparison, Measurement, and Data

  • Fractions are numbers that describe wholes divided into equal parts. Knowing how many equal parts they have will help students name fractions.

  • Fractions name points on a number line. Knowing about number lines can help students compare fractions with whole numbers and other fractions.

  • Students can use what they know about fraction models and number lines to find different names for the same fraction, or equivalent fractions.

  • Students can use what they know about fractions to compare fractions that have the same numerator or the same denominator.

Unit 5: Measurement Time, Liquid Volume, and Mass

  • Both analog and digital clocks are used to tell time. Knowing how to read and tell time to the nearest minute will help students solve problems involving elapsed time.

  • Students can use what they know about measurement to estimate and measure the volume of liquid in liters and the mass of an object in grams or kilograms.

Unit 6: Shapes Attrributes and Categories, Perimeter and Area, and Partitioning

  • Two-dimensional shapes have many attributes. Knowing about these attributes will help students categorize shapes.

  • Perimeter is the sum of a shape’s side lengths, and area measures the space inside the shape. Knowing a rectangle’s perimeter or area can help students reason about its shape.

  • Students can divide shapes into equal parts to show fractional parts of a whole.