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Paying for a science expedition using credit


Students play a game to explore how borrowing affects the total cost of purchases.

Big idea

Borrowing money instead of paying cash for items can increase the total amount paid.   

Essential questions

  • How can borrowing money to buy items increase the total amount you spend?
  • How do you calculate the cost of a purchase including interest? 


  • Calculate the total cost of items using an oversimplified interest formula 
  • Reflect on how borrowing affects the overall cost of an item

What students will do

  • Play a game to calculate the costs of borrowing money to buy supplies for an imaginary science expedition. 
  • Discuss how borrowing money can increase the total cost of something over time because of the interest rate on the loan. 

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Teacher guide


Note: Please remember to consider your students’ accommodations and special needs to ensure that all students are able to participate in a meaningful way.

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