First Grade · Science · week 2

Build a rubber-band guitar

Build a simple rubber-band instrument and change how tightly the band is stretched to change its pitch.

Sound instruments make vibrations you can control. A rubber band stretched over a box, or between two fingers, acts like a string. When you pluck it, it vibrates back and forth very fast, and you hear a note.

How tight you stretch the band changes the sound. A loose band flops slowly and makes a low, floppy sound. A tight band vibrates fast and makes a higher, tighter sound.

📋 For the teacher
Teach it (10–15 min):
  • Help stretch a sturdy rubber band around a small box so it has room to vibrate freely.
  • Let your child pluck first, then change the tightness together and predict the sound before plucking again.
  • Use the words "tight and high" and "loose and low" together every time so they pair up in memory.
  • If a rubber band is too small or thin to be safe, use a hair tie, or stretch the band between two fingers instead -- the box is not required.
Talk about it:
  • What happened to the sound when the band was tighter?
  • Why do you think a loose band makes a lower sound?
  • Could you make three different pitches with the same band?

Mastery looks like: They predict whether tightening or loosening a band will raise or lower its pitch, and confirm it by testing.

Common stumbles: Mixing up which direction -- tighter or looser -- raises the pitch; plucking too softly to hear a clear difference.

Homework for this lessonType it, write it with a stylus, or print it for pencil & paper.open →
Records attendance + 15 min of Science for this learner.
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