Balance Scale As A Mathematical Model

Make Connections

Performance Task

Ways of Thinking: Make Connections

Take notes about the different strategies your classmates used for finding the counterfeit coin(s).


As your classmates present, ask questions such as:

  • For one counterfeit coin: How do you know which side of the balance scale the counterfeit coin is on?
  • For two counterfeit coins: How can you be sure that both of the counterfeit coins are on that side of the balance scale?