← All Standards

Grade 3

• Geometry

  • 3.G.1

• Measurement & Data

  • 3.MD.1
  • 3.MD.2
  • 3.MD.3
  • 3.MD.5
  • 3.MD.6
  • 3.MD.7.a
  • 3.MD.7
  • 3.MD.7.b
  • 3.MD.7.c
  • 3.MD.7.d
  • 3.MD.8

• Numbers & Operations: Base Ten

  • 3.NBT.1
  • 3.NBT.2
  • 3.NBT.3

• Numbers & Operations: Fractions

  • 3.NF.1
  • 3.NF.2.a
  • 3.NF.2.b
  • 3.NF.3.a
  • 3.NF.3.b
  • 3.NF.3.c
  • 3.NF.3.d
  • 3.NF.3

• Operations & Algebraic Thinking

  • 3.OA.1
  • 3.OA.2
  • 3.OA.3
  • 3.OA.4
  • 3.OA.5
  • 3.OA.6
  • 3.OA.7
  • 3.OA.8
  • 3.OA.9

CCSS Math Standard: 3.OA.9

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.

Gr 3-5

Gr 1-4

Gr 1-4

Crossing Every Bridge Exactly Once (aka Eulerian Paths)

How can you cross each bridge in this city exactly once?

Gr 2-4

Math Curiosity: Magic Triangles

Can you make each side of this triangle add up to 9 using the digits 1-6?

Gr 2-8

Fizz Buzz: A Counting and Divisibility Game

Ready for a tricky counting and divisibility game?

Gr 3-6

Game: Number Scrabble

What if we played Tic-Tac-Toe with numbers and instead of three-in-a-row, we add up to 15? Well… then we’d have Number Scrabble!

Gr 1-6

Math Curiosity: Klauber’s Triangle

In 1932, a leading authority on rattlesnakes, Laurence Klauber, discovered a startling pattern within a triangle of primes.

Gr 2-8

Math Curiosity: Ulam Spiral

What if we make a huge spiral of numbers and then highlight only the primes? Well, a bunch of weird patterns show up!

Gr 1-4

Math Curiosity: Goldbach’s Conjecture

Can any even number be written as the sum of two primes? Goldbach thought so, but we haven’t proven it… yet!

Gr 1-5

Evens and Odds – Addition and Subtraction

When we’re adding and subtracting, do evens make odds into evens? Do odds make evens odd? Which one has… more power!?

Gr 3-4

Create Your Own Operation

The commutative and associative properties are a whole lot more interesting when you apply them to a mathematical operation that you created!

Gr 3-4

Exponents – How Low Can They Go?

Using exponent patterns, can students predict what the 0th power will be?

Gr 3-8

Math Curiosity: Four Squares

Every positive integer can be written as the sum of (at most) four perfect squares!

Gr 1, 2, 3, 4, 8

Math Curiosity: Magic Squares

Imagine a 3×3 square in which every row, column, and diagonal have the same sum. That’s a magic square!

Gr 1-4

Math Curiosity: Odds & Squares

Why does the sum of the first 5 odds also equal 5 squared?

Gr 1-4

Doubling Dollars

Say you have a dollar. Say you can double that dollar each day: $1, $2, $4, and so on. How long will it take to reach… one million dollars? Not as long as you might think!

Gr 3-6

Math Curiosity: Primes and Squares

Can any perfect square be written as the sum of two primes?

Gr 2-4

Math Curiosity: Legendre’s Conjecture

It seems like there’s always a prime number between two perfect squares… but is this always the case!?

Gr 3-6

Math Curiosity: Finding Primes

Prime numbers are unpredictable! How can we possibly find them all? An Ancient Greek mathematician found one way!

Gr 1, 2, 3, 4, 6

Math Curiosity: Twin Primes

What do you call two prime numbers who are very close together?

Gr 3-5

Math Curiosity: Palindromic Number Conjecture

Using this one weird trick, it seems that you can turn any number into a palindrome!

Gr 1-4

Math Curiosity: Collatz Conjecture

The Collatz Conjecture: start with any number and get to 1 using just two rules. It seems to always work…

Gr 1-5