Measuring for a
Metric Concentration Deck

Design a set of 20 cards: The size, shape, and design on the backs of the cards is up to you, with one condition: when you lay out the cards, they must tile the plane (fit together perfectly without gaps or overlaps).

Write on the faces of 10 of the cards:

  1. The diameter of a penny in mm
  2. The radius of a plate in cm
  3. The length of a pencil in cm
  4. The height of a student in cm
  5. The width of a classroom in m
  6. The width of a classroom in m
  7. The perimeter of a classroom in m
  8. The area of a sheet of paper in square cm
  9. The area of a table top in square m
  10. The floor area of a classroom in square m

Create 10 matching cards by measuring the diameter of a penny, the radius of a plate, etc. and writing the measurement on a card face. Don't forget to include the unit names (mm, cm, etc.)

Also write each measurement next to the items being measured on the list above. Keep the list for reference when you play the Metric Concentration game.

Use your 20-card deck to play a game of Metric Concentration:

  1. Shuffle the deck and lay out the cards face down.
  2. Each player turns 2 cards face up. If the cards match, the player collects them; if not, they are turned face down. Then it's the next player's turn.
  3. Continue until all cards have been collected. The player with the most cards wins.

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