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Learn Algebra II one skill at a time

A short diagnostic shows what you already know. Then you get a lesson and practice for each skill you're missing, with a full step-by-step solution for every question.

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Early access is by invitation. If you have an invite link, open it to join.

vertex (3, −4)15
x2−6x+5=(x−3)2−4x^2-6x+5=(x-3)^2-4Completing the square shows the vertex.

How it works

  1. 1

    Diagnostic

    About one question per skill. Takes 10 to 15 minutes.

  2. 2

    Skill map

    See which skills you've mastered and which need work.

  3. 3

    Learn

    A short lesson for your next skill, with worked examples.

  4. 4

    Practice

    Questions at your level. Open the full solution after each one.

  5. 5

    Mastery check

    Five questions confirm the skill. Then you move to the next one.

The first unit: Quadratics and Complex Numbers

Twelve skills, from factoring and completing the square to complex numbers and the quadratic formula. Every answer is checked by a math engine, not guessed by AI.

See all 12 skills in the unit
  • x2−x−6=(x−3)(x+2)x^2-x-6=(x-3)(x+2)
  • −18=3i2\sqrt{-18}=3i\sqrt{2}
  • 3+i1−2i=15+75i\dfrac{3+i}{1-2i}=\dfrac{1}{5}+\dfrac{7}{5}i
  • x=−b±b2−4ac2ax=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}

What early access involves

Who it's for
Students currently taking Algebra II, age 13 or older.
Time
About 45 to 60 minutes over a few sessions.
Feedback
A few short questions along the way and a two-minute final evaluation. Honest answers, including negative ones, help most and never affect your results.
Your data
We collect only what the program needs. You can pause, withdraw, or delete your data at any time.