Estimation Routines with GeoGebra

John Ulbright, 15/10/2015


  • 1. How Many?
  • 2. Placing Numbers (up to 50)
  • 3. Fraction Guesser
  • 4. What's the number?
  • 5. Part-Whole Rectangles
  • 6. Broken Clock (nearest minute)
  • 7. Relative number sizes via area
  • 8. Rounding within 1000
  • 9. What's the angle?
  • 10. Slope Guesser

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– John Ulbright

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