Department of Defense
Do Dea: Compound Interest
The compound interest formula that banks use when the interest is compounded continually is an exponential function. Review the regular formula for compound interest on this site. Great review for the AP Calculus test!
National Council of Teachers of Mathematics
The Math Forum: Ask Dr. Math: Compound Interest Rule of 70
This page gives a brief explanation on how to compute compound interest.
University of Nebraska Omaha
Ec Ed Web: M&m Interesting [Pdf]
This site from the University of Omaha provides a lesson plan indicated for 6-8th grades. "During this activity, students use the economic concepts of trade-offs and opportunity costs to decide between savings accounts with simple...
Texas Instruments
Texas Instruments: Compound Interest
In this activity, students use the TI graphing calculator to calculate compound interest. They understand that in compound interest computations, the interest from the previous period is added to the current principal and the new total...
Texas Instruments
Texas Instruments: Getting Started With Ti Navigator: Compound Interest
This lesson introduces students' to Activity Center. In this lesson, students will explore the effect of compound interest on the amount of an investment over time. Students will work in small groups (or individually) to calculate...
Illustrative Mathematics
Illustrative Mathematics: F Le Rising Gas Prices Compounding and Inflation
In this task, students explore exponential models in the context of a real-world problem. Students learn about price inflation for a single commodity and are introduced to the Consumer Price Index for measuring the inflation of a body of...
Other
Especial Gas Inc.: Sulfur Properties and Compounds
This page from Especial Gas Inc. contains some very interesting information about the element sulfur, and some of its common compounds. The history and relative abudance of the element is discussed, as well as where it can be found. The...
Free Math Help
Free Math Help: Compound Interest
The lesson examines compound interest. The tutorial consists of a future value formula, example, and additional resources.
Council for Economic Education
Econ Ed Link: Timing Is Everything
In the first part of the lesson, students examine the incentives and opportunity costs of spending and saving in a teacher directed lesson. The remainder of the lesson is an interactive website. Students work through problems that...
Illustrative Mathematics
Illustrative Mathematics: F Le a Valuable Quarter
The context of this task is that a quarter was put into a bank account in 1901 and students are asked to calculate its value in 2013 at two different interest rates. Those amounts are compared to the appreciation rate of a rare and...
Wolfram Research
Wolfram Math World: Compound Interest
This MathWorld site gives formulas involved in computing compound interest variables are fairly well defined at this site. If you scroll to the bottom of the page you will find a formula to find the time involved for the principle to...
Varsity Tutors
Varsity Tutors: Hotmath: Practice Problems: Compound Interest
Three problems offer practice with compound interest. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click the "View Solution" button to check each step of your...
University of Toronto (Canada)
Answers and Explanations Simple and Compound Interest
If a bank account produces "simple interest", the interest is paid directly and does not become part of the account's interest-bearing balance. That balance remains constant, and it's easy to figure out how much money you earn. This site...
Texas A&M University
The Rule of 72 for Compound Interest
This rule from Texas A&M will help you with your financial planning.
Texas Instruments
Texas Instruments: Compound Interest: Show Me the Money
This is an activity at the conclusion of the exponential relationship unit where students have experience with equations in the form y=a*b^x. Students use the random integer function on theTI-83 Plus to generate a rate of return for the...
Other
Compound Interest: A Rough Guide to Types of Scientific Evidence
This infographic takes a look at science in general, specifically focusing on the hierarchy of different types of scientific evidence.
Texas A&M University
Wtamu Virtual Math Lab: College Algebra: Exponential Functions
This tutorial explains exponential functions and provides links pertaining to topics on them. You will learn to use the exponent keys on your calculator, to graph exponential functions, and to solve compound interest problems.
Discovery Education
Discovery Education: Web Math: Math for Everyone
Provides online programs and explanations on everyday math: calculating a tip at a restaurant, determining the sale price of an item, finding the odds of winning a lottery, computing simple and compound interest, and more.
Paul Dawkins
Paul's Online Notes: Algebra: Applications
Provides examples of applications of exponential functions involving compound interest and exponential growth and decay, and an example of an application of a logarithm involving earthquake intensity.
Other
Brown Math: Loan and Investment Formulas
This site is provided for by the Oak Roads Systems. Compound interest can work either for or against you whether you're taking out a loan or making an investment. Either way, the set of formulas for interest is the same and they are...
Calculator Soup
Calculator Soup: Loan Calculator
Use this loan calculator to determine your monthly payment, interest rate, number of months or principal amount on a loan. Find your ideal payment by changing loan amount, interest rate and term and seeing the effect on payment amount.
Other
Nearpod: Exponential Functions
For this lesson, students will use the exponential function equation to solve real-life problems involving exponential growth and decay including the compound interest formula.
Texas Instruments
Texas Instruments: Numb3 Rs: Financial Futures
Based off of the hit television show NUMB3RS, this activity shows students how money invested at different interest rates grow differently. The lesson focuses on aspects of interest such as compounding, length of time between...
Texas Instruments
Texas Instruments: Math Today for Ti Navigator System College Costs Surge
During this activity, students will explore the expected cost of college and also look at methods of saving money for the future. Comparing simple and compound interest will help students make decisions about their future. Students will...
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