Presentation

  1. 1

    Begin with only the lightest and heaviest sets. Mix the tablets on the table.

  2. 2

    Place one tablet on the flat pads of the fingers of each hand, not gripping.

  3. 3

    Move both hands up and down slightly a few times to feel the weight.

  4. 4

    Place the heavier tablet to one side and the lighter to the other.

  5. 5

    Continue with the next two tablets until all are sorted into two piles.

  6. 6

    Show the child that the heavy tablets are the darker wood.

  7. 7

    Give the three-period lesson: "heavy", "light".

  8. 8

    Repeat with eyes closed or blindfolded.

Extensions, easiest to hardest

  1. Add the medium tablets and sort into three piles.
  2. Grade one of each weight from heaviest to lightest: "heavy, heavier, heaviest".
  3. Sort blindfolded with all three weights mixed.
  4. Compare other classroom objects by lifting: which is heavier?

Control of error

The color of the wood: each weight is a different color, so the child opens the eyes and checks.

Ready to move on when the child…

  • Sorts two weights blindfolded without error
  • Sorts three weights blindfolded
  • Uses heavy/heavier/heaviest and light/lighter/lightest

Try “pink tower”, “tummy”, “diaper”, “grace and courtesy”, or “October”.