Video summary

Trabajando el número 10 con regletas

Main summary

Key takeaways

Educational

Main ideas / concepts

The video is a classroom activity for first-grade students focused on the complements of 10—finding what number must be added to another to make 10, and also working backward using subtraction.

The teacher uses “regletas” (number rods) as a hands-on tool to:

  • Build number pairs that sum to 10
  • Perform subtraction from 10 by removing rods

Methodology / step-by-step instructions (what the class does)

A) Build complements of 10 using rods

The teacher guides students to complete complements so that each set of rods makes 10. For each target “rod number,” students provide the missing partner number:

  • 1 + 9 = 10
  • 2 + 8 = 10
  • 3 + 7 = 10
  • 4 + 6 = 10
  • 5 + 5 = 10
  • 6 + 4 = 10
  • 7 + 3 = 10
  • 8 + 2 = 10
  • 9 + 1 = 10

B) Review addition by listing the completed pairs

The teacher confirms the addition results as a complete set of complements to 10:

  • 1+9, 2+8, 3+7, 4+6, 5+5, 6+4, 7+3, 8+2, 9+1

C) Use rods to perform subtraction starting from 10

Students subtract by “removing” a rod from 10, then stating what remains. Example pattern shown:

  • Remove 9 → remains 1
  • Remove 8 → remains 2
  • Remove 7 → remains 3
  • Remove 6 → remains 4
  • Remove 5 → remains 5
  • Remove 4 → remains 6
  • Remove 3 → remains 7
  • Remove 2 → remains 8
  • Remove 1 → remains 9

D) Sing/chant songs that reinforce complements to 10

The class sings a partner-pair song that pairs numbers to 10 (e.g., “9 with 1,” “8 with 2,” down to “1 with 9”).

Then they do a “Chumba” chant: the teacher/leader places rods and students say the missing number to reach 10:

  • If the student has 1 → missing 9
  • If the student has 2 → missing 8
  • If the student has 3 → missing 7
  • If the student has 4 → missing 6
  • If the student has 5 → missing 5
  • If the student has 6 → missing 4
  • If the student has 7 → missing 3
  • If the student has 8 → missing 2
  • If the student has 9 → missing 1

Speakers / sources featured

  • Rita — first-grade teacher at Puerto Tomal school in Carral
  • Students / children mentioned in the subtitles:
    • Yisa
    • Sheila
    • Liam
    • Sara
    • Daniela
    • Michel
    • Luisa
  • Unspecified “director” / leader — referenced in the chants (e.g., “the director and I place the rods”)

Original video