← All Standards

Grade 2

• Strand 1

  • 2.1.A
  • 2.1.B
  • 2.1.C
  • 2.1.D
  • 2.1.E
  • 2.1.F
  • 2.1.G

• Strand 2

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

• Strand 3

  • 2.3.A
  • 2.3.B
  • 2.3.C
  • 2.3.D

• Strand 4

  • 2.4.A
  • 2.4.B
  • 2.4.C
  • 2.4.D

• Strand 5

  • 2.5.A
  • 2.5.B

• Strand 6

  • 2.6.A
  • 2.6.B

• Strand 7

  • 2.7.A
  • 2.7.B
  • 2.7.C

• Strand 8

  • 2.8.A
  • 2.8.B
  • 2.8.C
  • 2.8.D
  • 2.8.E

• Strand 9

  • 2.9.A
  • 2.9.B
  • 2.9.C
  • 2.9.D
  • 2.9.E
  • 2.9.F
  • 2.9.G

• Strand 10

  • 2.10.A
  • 2.10.B
  • 2.10.C
  • 2.10.D

• Strand 11

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

TEKS Math Standard: 2.1.G

display, explain, and justify mathematical ideas and arguments using precise mathematical language in written or oral communication

Lines, Line Segments, Rays, and Infinity!

A lesson about lines, line segments, and rays that avoids dull memorization. Instead, we ponder this delightful question: Which is longer, a ray or a line? Then, kids consider what these different geometric concepts would think about each other.

Gr 2-8

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 3-6