Doubling your money


My friend and I were arguing about how long it would take me to double my investment amounts.  How will your students figure this out?  Are there any tricks?  Explore investing and exponential growth as your students discover "The Rule of 72."  Also check out this Rule of 72 calculator (below) & this video from Khan Academy on the Rule of 72.

Rule of 72 activity: doubling-your-money.pdf

For members we have an editable Word docx, an Excel data file and solutions.

doubling-your-money.docx      Double_your_money_data.xlsx       doubling-your-money-solution.pdf


Either while or after students are discovering the rule of 72, consider using this rule of 72 calculator to help cement home the relationship.

Rule of 72 Calculator - by


Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.