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Precalculus 9-12

Welcome.

12 weeks · paper-style learning, on screen

Pick a week to start (or pick up where you left off). Each week has Mon-Fri lessons and a celebration recap.

ALL WEEKS

WEEK 01 · FREE

The Complex Plane

// Dock lights on a grid

MONTUEWEDTHUFRISAT
WEEK 02 · FREE

Every Polynomial Factors

// Planks in Pascal's rows

MONTUEWEDTHUFRISAT
WEEK 03 · FREE

Rational Functions

// Lap times that climb toward a wall

MONTUEWEDTHUFRISAT
WEEK 04 · FREE

Inverses Everywhere

// The winch rule run backwards

MONTUEWEDTHUFRISAT
WEEK 05 · FREE

Tangent, Symmetry and the Turn

// The mast's shadow

MONTUEWEDTHUFRISAT
WEEK 06 · FREE

The Addition Formulas

// Two oars at an angle

MONTUEWEDTHUFRISAT
WEEK 07 · FREE

Inverse Trig and the Water Wave

// Reading the gauge backwards

MONTUEWEDTHUFRISAT
WEEK 08 · FREE

Laws of Sines and Cosines

// The buoy sighted from shore

MONTUEWEDTHUFRISAT
WEEK 09 · FREE

Ellipses and Hyperbolas

// The chalk oval on the lawn

MONTUEWEDTHUFRISAT
WEEK 10 · FREE

Vectors

// Rowing across the drift

MONTUEWEDTHUFRISAT
WEEK 11 · FREE

Matrices

// The lane card grid

MONTUEWEDTHUFRISAT
WEEK 12 · FREE

Counting, Expected Value and Regatta Day

// The heats drawn by lot

MONTUEWEDTHUFRISAT