Did you know that when you open a bank account, the bank gives you free money for keeping your savings there? That extra money is called interest, and in this BrainPOP movie, Tim and Moby show you exactly how it works. You’ll learn how interest can be calculated on a yearly, monthly, or even daily basis, and how the interest you accumulate is proportional to how much money you have in the bank. You’ll also learn the differences between simple interest and compound interest, and how to calculate each. So open an account with the First National Bank of Moby and find out everything you ever wanted to know about interest!