3rd Grade Common Core Math Resources

Units of Study

San Diego Unified School District (here's the District's CCSS website--lots of resources!)

Georgia Units: (even though the state has actually pulled out of CCSS, the resources they created are AMAZING!  Here's their math website.)

North Carolina Unit: (they have a great website for the Public Schools of North Carolina with lots of support resources.)

University of Texas Scope: (they have a great website called Mathematics Common Core Toolbox--check it out!)

EngageNY Third grade math resources.  This seems to be everyone's gold standard for CCSS materials.

Bridges in Mathematics: (the Bridges in Mathematics website)

This is cool:  math standards written in kid-friendly language: (From the Ontario-Montclair School District)
Third Grade Math Standards in Kid Friendly Language

Third Grade Flipbook(FlipBooks are meant to help teachers understand what each standard means in terms of what students must know and be able to do. They provide only a sample of instructional strategies and examples.)

Math Vocabulary from Granite School District in Utah

Compare the CCSS to the current state standards: (from Tulare County Office of Ed.  A great website for resources, too!)

Howard County Public School System Common Core Assessments.  VERY well designed assessments for each standard.  Check them out!

Videos explaining 3rd grade standards from Southeast Comprehensive Center.  Really interesting!

"I Can Statements" for each standard from Dr. Bobb Darnell on his website called Achievement Strategies, Inc.  Check them out!

Got any lessons, resources, websites that you want to share??  Add them to our Third Grade Math Dropbox!  Let's help each other out!!

Want to continue the dialogue?  Check out and add yourself as a member of this website's Facebook page here!!

Activities and Lessons by Strand

(activities listed are from: Illustrative MathematicsInside Mathematics,  LearnZillion, Howard County Common Core Assessments)

Domain:  Operations and Algebraic Thinking 3.OA

Standard A (Represent and solve problems involving multiplication and division):

A1 (Interpret products of whole numbers, e.g. interpret 5 x 7 as the total number of objects in 5 groups of 7 objects in each.  For example, describe a context in which a total number of objects can be expressed as 5 x 7):

Multiplying by 11 (go to page 41 of the PDF, other activities, too!)

Video from LearnZillion:  Convert Between Units Using a T Chart

Howard County assessment page with beautiful assessments of this standard, plus more!!

A2 (Interpret whole-number quotients of whole numbers, e.g. interpret 56 ÷ 8 as the number of objects in each share when 56 objects are partitioned equally into 8 shares, or as a number of shares when 56 objects are partitioned into equal shares of 8 objects each.  For example, describe a context in which a number of shares or a number of groups can be expressed as 56 ÷ 8):

Multiplying & Dividing on the Number Line (go to page 41 of the PDF, other activities, too!)

Video from LearnZillion:  Divide Using a Sharing Model
Video from LearnZillion:  Divide Using Repeated Subtraction
Video from LearnZillion:  Visualizing a Division Word Problem
Video from LearnZillion:  Solve Division Problems Using Equal Groups

Howard County assessment page with beautiful assessments of this standard, plus more!!

A3 (Use multiplication and division within 100 to solve word problems in situations involving equal groups, arrays, and measurement quantities, e.g. by using drawings and equations with a symbol of the unknown number to represent the problem):

More Number Puzzles (go to page 29 of the PDF, other activities, too!)
Multiplying by 11s and 12s (go to page 41 of the PDF, other activities, too!)

Howard County assessment page with beautiful assessments of this standard, plus more!!

A4 (Determine the unknown whole number in a multiplication or division equation relating three whole numbers.  For example, determine the unknown number that makes the equation true in each fo the equations 8 x ? = 48,  5 = [] ÷ 3, 6 x 6 = ?):

True of False? (go to page 29 of the PDF, other activities, too!)
Fact Family Triangles (go to page 61 of the PDF)
Hours to Minutes (go to page 151 of the PDF)

Howard County assessment page with beautiful assessments of this standard, plus more!!

Standard B (Understand properties of multiplication and the relationship between multiplication and division):

B5 (Apply properties of operations as strategies to multiply and divide.  Examples:  if 6 x 4 = 24 is known, then 4 x 6 = 24 is also known-Commutative property of multiplication.  3 x 5 x 2 can be found by 3 x 5 = 15, then 15 x 2 = 30, or by 5 x 2 = 10, then 3 x 10 = 30-Associative property of multiplication.  Knowing that 8 x 5 = 40 and 8 x 2 = 16, one can find 8 x 7 as 8 x (5 + 2) = (8 x 2) = 40 + 16 = 56-Distiributive property):

An Array of Fact Families (go to page 41 of the PDF, other activities, too!)

Boxing the Pots

Howard County assessment page with beautiful assessments of this standard, plus more!!

B6 (Understand division as an unknown-factor problem.  For example, find 32 ÷ 8 by finding the number that makes 32 when multiplied by 8):

The Frog Jumping Contest (go to page 41 of the PDF, other activities, too!)

Boxing the Pots

Howard County assessment page with beautiful assessments of this standard, plus more!!

Standard C (Multiply and divide within 100):

C7 (Fluently multiply and divide within 100, using strategies such as the relationship between multiplication and division, e.g. knowing that 8 x 5 = 40, one knows 40 ÷ 5 = 8, or properties of operations.  By the end of grade 3, know from memory al products of two one-digit numbers):

Expressions, Equations, & Word Problems (go to page 29 of the PDF, other activities, too!)
Multiplying Odd & Even Numbers (go to page 41 of the PDF, other activities, too!)

Video from LearnZillion:  Understand Multiplication with 0 and 1
Video from LearnZillion:  Understand Division with 0 and 1

Howard County assessment page with beautiful assessments of this standard, plus more!!

Standard D (Solve problems involving the four operations, and identify and explain patterns in arithmetic):

D8 (Solve two-step word problems using the four operations.  Represent these problems using equations with a letter standing for the unknown quantity.  Assess the reasonableness of answers using mental computational and estimation strategies including rounding):

True or False? (go to page 29 of the PDF, other activities, too!)
Multiplying by 11 (go to page 41 of the PDF, other activities, too!)
Multiplying by 12 (go to page 77 of the PDF, other activities, too!)
Are These Answers Reasonable? (go to page 125 of the PDF, other activities, too!)

Boxing the Pots

Howard County assessment page with beautiful assessments of this standard, plus more!!

D9 (Identify arithmetic patterns-including patterns in the addition table or multiplication table-and explain them using properties of operations.  For example, observe that 4 times a number is always even, and explain why 4 times a number can be decomposed into two equal addends):

Multiplying Odd & Even Numbers (go to page 55 of the PDF)

Houses in a Row

Video from LearnZillion:  Identify Patterns on an Addition Chart
Video from LearnZillion:  Identify Patterns Using Number Lines

Howard County assessment page with beautiful assessments of this standard, plus more!!

Domain:  Number and Operations in Base Ten   3.NBT

Standard A (Use place value understanding and properties of operations to perform multi-digit arithmetic):

A1 (Use place value understanding to round while numbers to the nearest 10 or 100):

Think Before You Subtract (go to page 77 of the PDF, other activities, too!)
Using Compatible Numbers to Estimate Answers (go to page 125 of the PDF, other activities, too!)

A Question of Numbers

Howard County assessment page with beautiful assessments of this standard, plus more!!

A2 (Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction):

Think Before You Add (go to page 77 of the PDF, other activities, too!)
Travel Miles (go to page 125 of the PDF, other activities, too!)

A Question of Numbers

Video from LearnZillion:  Solve for Unknowns Using Fact Families

Howard County assessment page with beautiful assessments of this standard, plus more!!

A3 (Multiply one-digit whole numbers by multiples of 10 in the range 10-90, e.g. 9 x 80, 5 x 60-using strategies based on place value and properties of operations):

Multiplying Single-Digits by Multiples of Ten (go to page 139 of the PDF, other activities, too!)

Video from LearnZillion:  Multiply 1-Digit Numbers by Multiples of 10
Video from LearnZillion:  Divide Multiples of 10 by 1-Digit Divisors

Howard County assessment page with beautiful assessments of this standard, plus more!!

Domain:  Number and Operations-Fractions   3.NF

Standard A (Develop understanding of fractions as numbers):

A1 (Understand a fraction 1/b s the quantity formed by 1 part when a whole is partitioned into b equal parts; understand a fraction a/b as the quantity formed by a parts of size 1/b):

Leapfrog Fractions

Fractions on a Double Number Line (go to page 117 of the PDF)

Video from LearnZillion:  Understand Fractions as Fair Shares
Video from LearnZillion:  Represent Fractions i Different Ways
Video from LearnZillion:  Write Fractions Using Shapes (1)
Video from LearnZillion:  Write Fractions of a Set (1)
Video from LearnZillion:  Write Fractions of a Set (2)
Video from LearnZillion:  Count Fractions to Make 1 Whole
Video from LearnZillion:  Understand Fractions:  Create Ministories

Howard County assessment page with beautiful assessments of this standard, plus more!!

A2 (Understand a fraction as a number on the number line; represent fractions on a number line diagram):

Howard County assessment page with beautiful assessments of this standard, plus more!!

A2a (Represent a fraction 1/b on a number line diagram by defining the interval from 0 to 1 as the whole and partitioning it into b equal parts.  Recognize that each part has size 1/b and that the endpoint of the part based at 0 locates the number 1/b on the number line):
Fractions on a Double Number Line (go to page 117 of the PDF)

Video from LearnZillion:  Plot a Unit Fraction on a Number Line
Video from LearnZillion:  Place Fractions on a Number Line (1)

Howard County assessment page with beautiful assessments of this standard, plus more!!

A2b (Represent a fraction a/b on a number line diagram by marking off a lengths 1/b from 0.  Recognize that the resulting interval has size a/b and that its endpoint locates the number a/b on the number line):

Fractions on a Double Number Line (go to page 117 of the PDF)

Video from LearnZillion:  Plot Improper Fractions on a Number Line
Video from LearnZillion:  Place Fractions on a Number Line (2)

Howard County assessment page with beautiful assessments of this standard, plus more!!

A3 (Explain equivalence of fractions in special cases, and compare fractions by reasoning about their size):

Leapfrog Fractions

Howard County assessment page with beautiful assessments of this standard, plus more!!

A3a (Understand two fractions as equivalent-equal-if they are the same size, or the same point on a number line):

Howard County assessment page with beautiful assessments of this standard, plus more!!

A3b (Recognize and generate simple equivalent fractions, e.g. 1/2 = 2/4, 4/6 = 2/3.  Explain why the fractions are equivalent, e.g. by using a visual fraction model):

Howard County assessment page with beautiful assessments of this standard, plus more!!

A3c (Express whole numbers as fractions, and recognize fractions that are equivalent to whole numbers.  Examples:  Express 3 in the form 3 = 3/1; recognize that 6/1 = 6; locate 4/4 and 1 at the same point of a number line diagram):

Video from LearnZillion:  Express Whole Numbers as Fractions

Howard County assessment page with beautiful assessments of this standard, plus more!!

A3d (Compare two fractions with the same numerator of the same denominator by reasoning about their size.  Recognize that comparisons are valid only when the symbols  <, =, and >, and justify the conclusions, e.g. by using a visual fraction model):

Howard County assessment page with beautiful assessments of this standard, plus more!!

Domain:  Measurement and Data   3.MD

Standard A (Solve problems involving measurement and estimation of intervals of time, liquid volumes, and masses of objects):

A1 (Tell and write time to the nearest minute and measure time intervals in minutes.  Solve word problems involving addition and subtraction of time intervals in minutes, e.g. by representing the problem on a number line diagram):

Hours to Minutes (go to page 151 of the PDF)
Measuring the Area of Paper Rectangles (go to page 233 of the PDF, other activities, too!)
Skill Practice (go to page 111 of the PDF)

Time to Get Clean

Video from LearnZillion:  Reading the Exact Minute on a Clock

Video from LearnZillion:  Reading the Exact Time on a Clock
Video from LearnZillion:  Drawing the Exact Time on a Clock

Howard County assessment page with beautiful assessments of this standard, plus more!!

A2 (Measure and estimate liquid volumes and masses of objects using standard units of grams-g-, kilograms-kg-and liters-l-.  Add subtract, multiply, or divide to solve one-step word problems involving masses or volumes that are given in the same units, e.g. by using drawings-such as a beaker with a measurement scale-to represent the problem):

Video from LearnZillion:  Estimate Volume in Liters
Video from LearnZillion:  Measure Volume in Liters
Video from LearnZillion:  Understand Mass and How Mass is Measured
Video from LearnZillion:  Estimate Mass in Grams
Video from LearnZillion:  Estimate Mass in Kilograms Using Benchmarks
Video from LearnZillion:  Measure Mass in Grams
Video from LearnZillion:  Measure Mass in Kilograms

Howard County assessment page with beautiful assessments of this standard, plus more!!

Standard B (Represent and interpret data):

B3 (Draw a scaled picture graph and a scaled bar graph to represent a data set with several categories.  Solve one- and two-step "how many more" and "how many less" problems using information presented in scaled bar graph.  For example, draw a bar graph in which each square in the bar graph might represent 5 pets):

Ice Cream Survey (go to page 277 of the PDF, other activities, too!)
Book Lovers' Survey (go to page 277 of the PDF, other activities, too!)

Parking Cars

Howard County assessment page with beautiful assessments of this standard, plus more!!

B4 (Generate measurement data by measuring lengths using rulers marked with halves and fourths of an inch.  Show the data by making a line plot, where the horizontal scale is marked off in appropriate units-whole numbers, halves, or quarters):

Howard County assessment page with beautiful assessments of this standard, plus more!!

Standard C (Geometric measurement:  understand concepts of area and relate area to multiplication and to addition):

C5 (Recognize area as an attribute of plane figures and understand concepts of area measurement):

Garden Design

Howard County assessment page with beautiful assessments of this standard, plus more!!

C5a (A square with side length 1 unit, called "a unit square", is said to have "one square unit" of area, and can be used to measure area)
Finding Areas Large and Small (go to page 219 of the PDF, other activities, too!)
Measuring Area: US Customary Units (go to page 243 of the PDF, other activities, too!)
Measuring Rectangles (go to page 259 of the PDF, other activities, too!)

Howard County assessment page with beautiful assessments of this standard, plus more!!

c5b (A plane figure which can be covered without gaps or overlaps by n unit squares is said to have an area of n square units):
Finding More Areas (go to page 219 of the PDF, other activities, too!)
Estimating and Measuring Area in Square Inches (go to page 243 of the PDF, other activities, too!)
Ladybug Dream House (go to page 259 of the PDF, other activities, too!)

Video from LearnZillion:  Find the Area of a Shape Using Square Units
Video from LearnZillion:  Use Equal Square Units to Find the Area
Video from LearnZillion:  Use Grid Paper to Find the Area

Howard County assessment page with beautiful assessments of this standard, plus more!!

C6 (Measure areas by counting unit squares-square cm, square m, square in, square ft. and improvised units):
Measuring the Area of Paper Rectangles (go to page 219 of the PDF, other activities, too!)
Rainbow Rectangles (go to page 243 of the PDF, other activities, too!)
Metric Rectangles (go to page 259 of the PDF, other activities, too!)

Garden Design

Video from LearnZillion:  Find the Area of a Polygon Using a Key

Howard County assessment page with beautiful assessments of this standard, plus more!!

C7 (Relate area to the operations of multiplication and addition):

Boxing the Pots

Video from LearnZillion:  Relate Area to Arrays

Howard County assessment page with beautiful assessments of this standard, plus more!!

C7a (Find the area of a rectangle with whole-number side lengths by tiling it, and show that the area is the same as would be found by multiplying the side lengths):
Rainbow Rectangles (go to page 243 of the PDF, other activities, too!)
Ladybug Dream House (go to page 259 of the PDF, other activities, too!)

Video from LearnZillion:  Find the Area of a Rectangle Using Arrays

Howard County assessment page with beautiful assessments of this standard, plus more!!

C7b (Multiply side lengths to find areas of rectangles with whole-number side lengths in the context of solving real world and mathematical problems, and represent whole-number products as rectangular areas in mathematical reasoning):
Fact Families for the 10s (go to page 41 of the PDF, other activities, too!)
Measuring the Area of Paper Rectangles (go to page 221 of the PDF)

Howard County assessment page with beautiful assessments of this standard, plus more!!

C7c (Use tiling to show in a concrete case that the area of a rectangle with whole-number side lengths a and b + c is the sum of a x b and a x c.  Use area modles to represent the distributive property in mathematical reasoning.

Multiplying by 11 (go to page 41 of the PDF, other activities, too!)

Howard County assessment page with beautiful assessments of this standard, plus more!!

C7d (Recognize areas as additive.  Find areas of rectilinear figures by decomposing them into non-overlapping rectangles and adding the areas of the non-overlapping parts, applying this technique to solve real world problems):

Howard County assessment page with beautiful assessments of this standard, plus more!!

Standard D (Geometric measurement:  recognize perimeter as an attribute of plane figures and distinguish between linear and area measures):

D8 (Solve real world and mathematical problems involving perimeters of polygons, including finding the perimeter given the side lengths, finding an unknown side length, and exhibiting rectangles with the same perimeter and different areas or with the same area and different perimeters):

Perimeters of Paper Quadrilaterals (go to page 183 of the PDF, other activities, too!)
Perimeter Review (go to page 217 of the PDF, other activities, too!)

Video from LearnZillion:  Find the Perimeter of a Polygon
Video from LearnZillion:  Find Perimeter With Missing Side Lengths

Howard County assessment page with beautiful assessments of this standard, plus more!!

Domain:  Geometry   3.G

Standard A (Reason with shapes and their attributes):

A1 (Understand that shapes in different categories, e.g. rhombuses, rectangles, and others, may share attributes, e.g. having four sides, and that the shared attributes can define a larger category, e.g. quadrilaterals.  Recognize rhombuses, rectangles, and squares as examples of quadrilaterals, and draw examples of quadrilaterals that do not belong to any of these subcategories):
Classify Triangles (go to page 153 of the PDF, other activities, too!)
Sorting Quadrilaterals (go to page 183 of the PDF, other activities, too!)
Guess My Quadrilateral (go to page 183 of the PDF, other activities, too!)

Which Shape?

Howard County assessment page with beautiful assessments of this standard, plus more!!

A2 (Partition shapes into parts with equal areas.  Express the area of each part as a unit fraction of the whole.  For example, partition a shape into 4 parts with equal area, and describe the area of each part as 1/4 of the area of the shape):

Howard County assessment page with beautiful assessments of this standard, plus more!!

If you find other activities, email me and I'll add them to this site!!

Thank you to 4th Grade Loma Portal teacher, Amy Kinseth, for creating this page of Teacher Common Core Materials. Please email her with questions or comments at akinseth.lomaportal@gmail.com.