SproutQuantica Prealgebra Home Start free

Algebra I

Learn Algebra I by solving, not memorizing. Work real problems with instant feedback and Sprout, a tutor that helps you find the answer yourself.

Start the course, free → See the curriculum
15chapters
81lessons
$0to start

What you'll learn

The full Algebra I path. Every lesson is a problem to crack, not a worksheet to grind.

Chapter 1 is live now, with new lessons arriving regularly while Algebra I is in early access.

Chapter 3

Exponents and Radicals

5 lessons
Chapter 4

Linear Equations

5 lessons
  • 4.1 What an Equation Says soon
  • 4.2 Solving Linear Equations soon
  • 4.3 Variables on Both Sides soon
  • 4.4 Equations in Disguise soon
  • 4.5 Word Problems soon
Chapter 5

Systems of Equations

6 lessons
  • 5.1 Two Variables, Two Equations soon
  • 5.2 Substitution soon
  • 5.3 Elimination soon
  • 5.4 Systems in Disguise soon
  • 5.5 Word Problems with Systems soon
  • 5.6 Three or More Variables soon
Chapter 6

Ratios, Percents, and Proportion

6 lessons
  • 6.1 Ratios, Simple and Subtle soon
  • 6.2 Conversion Factors soon
  • 6.3 Percents soon
  • 6.4 Percent Problems soon
  • 6.5 Direct and Inverse Proportion soon
  • 6.6 Joint Proportion and Rates soon
Chapter 7

Graphing Lines

6 lessons
  • 7.1 The Cartesian Plane soon
  • 7.2 Graphing Linear Equations soon
  • 7.3 Slope soon
  • 7.4 Finding the Equation of a Line soon
  • 7.5 Intercepts and Standard Forms soon
  • 7.6 Parallel, Perpendicular, and Comparing Lines soon
Chapter 8

Inequalities

5 lessons
  • 8.1 The Basics of Inequality soon
  • 8.2 Which Is Bigger soon
  • 8.3 Solving Linear Inequalities soon
  • 8.4 Graphing Inequalities soon
  • 8.5 Optimization soon
Chapter 9

Quadratics I, Factoring

5 lessons
  • 9.1 Meet the Quadratic soon
  • 9.2 Factoring x² + bx + c soon
  • 9.3 Factoring ax² + bx + c soon
  • 9.4 Roots, Sums, and Products soon
  • 9.5 Factoring in Action soon
Chapter 10

Special Factorizations

4 lessons
  • 10.1 Squares of Binomials soon
  • 10.2 The Difference of Squares soon
  • 10.3 Sums and Differences of Cubes soon
  • 10.4 Clever Factoring Tricks soon
Chapter 11

Quadratics II, Formula and Complex Numbers

5 lessons
  • 11.1 Completing the Square soon
  • 11.2 The Quadratic Formula soon
  • 11.3 Imaginary Numbers soon
  • 11.4 Complex Numbers soon
  • 11.5 Applications of Quadratics soon
Chapter 12

Graphing Quadratics

5 lessons
  • 12.1 Parabolas soon
  • 12.2 Circles soon
  • 12.3 Quadratic Inequalities soon
  • 12.4 Squares Are Never Negative soon
  • 12.5 Optimization with Quadratics soon
Chapter 13

Functions

6 lessons
  • 13.1 The Function Machine soon
  • 13.2 Combining and Composing Functions soon
  • 13.3 Inverse Functions soon
  • 13.4 Graphing Functions soon
  • 13.5 Transformations of Graphs soon
  • 13.6 Problem Solving with Functions soon
Chapter 14

Polynomials, Exponentials, and Logarithms

5 lessons
  • 14.1 Adding and Subtracting Polynomials soon
  • 14.2 Multiplying Polynomials soon
  • 14.3 Exponential Growth soon
  • 14.4 Compound Interest soon
  • 14.5 What Is a Logarithm soon
Chapter 15

Special Functions and Sequences

6 lessons
  • 15.1 Absolute Value soon
  • 15.2 Floor, Ceiling, and Piecewise Functions soon
  • 15.3 Radical and Rational Functions soon
  • 15.4 Arithmetic Sequences and Series soon
  • 15.5 Geometric Sequences and Series soon
  • 15.6 Telescoping and Symmetry Tricks soon

How it works

01

Solve, don't memorize

Each lesson is a real problem. The idea emerges as you work toward it.

02

Guided, never spoiled

Layered hints and Sprout nudge you toward the answer without handing it over.

03

It sticks

Because you discovered it yourself, the next hard problem feels winnable.

Good to know

Is the Algebra I course free?

Yes, you can start Algebra I for free while it is in early access, no card required.

What does Quantica's Algebra I cover?

Expressions, linear equations, exponents and radicals, systems, graphing, inequalities, quadratics, functions, polynomials, exponentials, and logarithms, 15 chapters in all.

Do I need to finish Prealgebra first?

No, but the two fit together. If arithmetic and fractions feel shaky, Prealgebra builds the ground Algebra I stands on.

How is Quantica's Algebra I different?

You learn by solving real problems with instant feedback and layered hints, so each idea emerges from your own work instead of being memorized.

Start solving.

Start Algebra I, free →