← All Standards

Grade 1

• Strand 1

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

• Strand 2

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

• Strand 3

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

• Strand 4

  • 1.4.A
  • 1.4.B
  • 1.4.C

• Strand 5

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

• Strand 6

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

• Strand 7

  • 1.7.A
  • 1.7.B
  • 1.7.C
  • 1.7.D
  • 1.7.E

• Strand 8

  • 1.8.A
  • 1.8.B
  • 1.8.C

• Strand 9

  • 1.9.A
  • 1.9.B
  • 1.9.C
  • 1.9.D

TEKS Math Standard: 1.1.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.