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Algebra · Calculus · AP Statistics

Math, without limits.

Clear lessons, worked examples, interactive graphs, and instant-feedback practice — everything you need to actually understand algebra, calculus, and AP Statistics.

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subjects
3
subjects
lessons
15
lessons
practice questions
51
practice questions

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Each course is organized into units, from first principles to exam-level problems.

x=−b±b2−4ac2ax = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}

ALGEBRA I & II

Algebra

Solve equations, graph lines, factor polynomials, and work fluently with exponents and logarithms — the foundation every later course is built on.

3 units · 5 lessons
∫abf(x) dx=F(b)−F(a)\int_a^b f(x)\,dx = F(b) - F(a)

AP CALCULUS AB

Calculus

Build intuition for limits, derivatives, and integrals with interactive graphs — aligned with AP Calculus AB topics.

3 units · 5 lessons
z=x−μσz = \frac{x - \mu}{\sigma}

AP STATISTICS

AP Statistics

Describe distributions, reason with probability, and draw conclusions with confidence intervals and significance tests — the core of the AP Statistics exam.

4 units · 5 lessons

How every lesson works

  1. 1

    Read the idea

    Short, plain-English explanations with the key formula front and center.

  2. 2

    Follow an example

    Step-by-step worked problems show exactly how the method plays out.

  3. 3

    Play with it

    Drag sliders on live graphs to see slopes, areas, and probabilities change.

  4. 4

    Practice instantly

    Answer questions with hints and get a full explanation the moment you check.

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Open mixed practice
1

Slope & Linear Functions

What is the slope of the line through (2,5)(2, 5) and (6,17)(6, 17)?