← All Standards

Grade 5

• Strand 2

  • 5.2.A
  • 5.2.B
  • 5.2.C

• Strand 3

  • 5.3.A
  • 5.3.B
  • 5.3.C
  • 5.3.D
  • 5.3.E
  • 5.3.F
  • 5.3.G
  • 5.3.H
  • 5.3.I
  • 5.3.J
  • 5.3.K
  • 5.3.L

• Strand 4

  • 5.4.A
  • 5.4.B
  • 5.4.C
  • 5.4.D
  • 5.4.E
  • 5.4.F
  • 5.4.G
  • 5.4.H

• Strand 5

  • 5.5

• Strand 6

  • 5.6.A
  • 5.6.B

• Strand 7

  • 5.7

• Strand 8

  • 5.8.A
  • 5.8.B
  • 5.8.C

• Strand 9

  • 5.9.A
  • 5.9.B
  • 5.9.C

• Strand 10

  • 5.10.A
  • 5.10.B
  • 5.10.C
  • 5.10.D
  • 5.10.E
  • 5.10.F

TEKS Math Standard: 5.4.A

identify prime and composite numbers

Factors and Codes: First Names (Episode 2)

Scrambled up somewhere in 161,000 is a first name. Can you find it!?

Gr 3, 4, 6, 7

Factors and Codes (Episode 1)

Let’s use factors to encode and decode words.

Gr 3, 4, 6

Fizz Buzz: A Counting and Divisibility Game

Ready for a tricky counting and divisibility game?

Gr 1-4

Math Curiosity: Klauber’s Triangle

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

Gr 1-5

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

Math Curiosity: Waring’s Conjecture

So, can you write every odd (greater than 3) as the sum of three primes?

Gr 1-5

Math Curiosity: Primes and Squares

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

Gr 1, 2, 3, 4, 5, 6, 8

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, 4, 5, 6, 8

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 3-4