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Life Skills · 10th Grade
Interest, Debt and Compounding
The maths behind loans and savings — the same formula pointing two ways.
How to use it
Run the compound interest formula on a credit card balance. It is a persuasive lesson.
Free · print-ready PDF · US Letter and A4
- Grade
- 10th Grade
- Ages
- 15–16
- Subject
- Life Skills
- Pages
- 1
The rest of the 10th Grade wall
49 more posters, all free to print — 11 of them here.
Standardised Test StrategyHow to spend the time, and when guessing is correct.Writing a Personal StatementWhat admissions readers actually look for, and the openings to avoid.Completing the SquareTurning any quadratic into vertex form — and where the quadratic formula comes from.Vertex FormThe form that hands you the graph without any working at all.End Behaviour of PolynomialsWhat the graph does at the far left and far right, from two pieces of information.Sum and Difference of CubesTwo patterns worth memorising, and the sign rule that keeps them straight.Rational ExpressionsFractions with algebra in them — and the values that are forbidden.Complex NumbersWhat happens when the discriminant is negative.LogarithmsA log is an exponent — reading the definition backwards makes everything easier.SOH-CAH-TOAThree ratios, and the labelling step that decides which one you need.The Special TrianglesTwo triangles whose exact ratios are worth knowing without a calculator.