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Money academy

Understand the numbers that shape your life. Short lessons and personal experiments.

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Investing

Compound interest

Compounding means a return can itself earn a return. At a constant 5%, 1,000 becomes 1,050 after one year and 1,102.50 after two. The e…

02P + I
Mortgage

How a mortgage works

A loan payment contains principal and interest. Early payments contain more interest because debt is higher. A longer term lowers the p…

036 × M
Emergency fund

Budget & buffer

A budget shows net income minus expenses. Divide annual bills by 12 to avoid an optimistic plan. Base a buffer on essential spending. A…

041 / 1.03¹⁰
Inflation impact

Inflation & purchasing power

Inflation reduces the purchasing power of uninvested cash. At 3% annually, 1,000 has about 744 of today’s purchasing power after ten ye…

Money lessons you can experience.

Bring real decisions into the classroom. Students explore, compare and explain results.

More tools for teaching

ModernScholar educational games and quizzes — complement the calculators with interactive practice in mathematics and other subjects.

EduPrintables printable worksheets — explore materials and tools for preparing exercises for the classroom and practice at home.

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A model, not a forecast. Rates and returns are your assumptions. This is not financial or tax advice.

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