Algebra, made visual
The engine of every later course: solve any linear equation, read a line straight off y = mx + b, crack systems, and tame quadratics — seeing why each rule works instead of memorizing it.
Module 1 · Linear equations & lines
Module 2 · Systems of equations
Module 3 · Exponents & polynomials
Module 4 · Factoring
Module 5 · Quadratic equations