Notes on using CompoundInterest.xls

This worksheet calculates the value of a sum appreciating or depreciating with compound interest over up to 4 years.

A step by step approach is used with the slider revealing one step at a time.

The initial amount and rate can be changed.

For depreciation enter a negative rate.

If you have a capable class you could show them the quick method of adding interest,

e.g. to add 4% interest multiply by 1.04, and then go on to work up a general formula.