What is DeltaMath? Complete Guide for Students & Teachers

Updated February 2026 · Comprehensive overview for students, teachers & parents

If your teacher just assigned homework on DeltaMath and you have no idea what it is, or if you are a teacher considering it for your classroom, this guide covers absolutely everything you need to know about the platform — how it works, what it costs, what students experience, and how it compares to alternatives.

DeltaMath is a free online math practice and assessment platform used by millions of students across the United States and beyond. It was created by Zach Korzyk, a math teacher from New York, who built it to give his own students a better way to practice math outside of class. Since then, it has grown into one of the most widely used math platforms in American education.

How DeltaMath Works

The core concept is simple: teachers create assignments, students complete them online, and the platform provides instant feedback with auto-grading. But the details of how this works make it particularly effective for math education.

Teachers start by selecting problems from a library of over 1,800 problem types spanning middle school math through AP Calculus. They choose how many problems to assign, set a due date, and can customize settings like whether students get limited or unlimited attempts, whether to show examples, and whether late submissions are accepted.

Students then log in (using a class code provided by their teacher), see their assignments on a dashboard, and work through problems one at a time. The key feature is instant feedback — after submitting each answer, students immediately know if they got it right or wrong. If wrong, they can see a worked example showing how to solve a similar problem, then try again.

This immediate feedback loop is what makes DeltaMath effective. Research in educational psychology consistently shows that the faster students receive correction after an error, the more effectively they learn from that mistake.

Key Features

DeltaMath Free vs. PLUS vs. INTEGRAL

DeltaMath offers three tiers for teachers. Students always access the platform for free — the subscription is on the teacher or school side.

Feature	Free	PLUS ($95/yr)	INTEGRAL (school pricing)
Unlimited assignments	✅	✅	✅
1,800+ problem types	✅	✅	✅
Auto-grading	✅	✅	✅
Worked examples	✅	✅	✅
Instructional videos	❌	✅	✅
Create printable tests	❌	✅	✅
Test corrections	❌	✅	✅
Problem sub-types	❌	✅	✅
Admin dashboard	❌	❌	✅
School-wide data	❌	❌	✅
Student work uploads	❌	❌	✅

The free version is genuinely powerful and many teachers use it for years without upgrading. The PLUS tier at $95 per year per teacher is where most upgrades happen, primarily for the test corrections and video features. INTEGRAL is a school-wide license with pricing based on school size, designed for administrators who want to see data across all math classrooms.

What Students Experience

From a student perspective, using DeltaMath typically looks like this:

You get a class code from your teacher, create an account at deltamath.com/app, and immediately see your assignments. Each assignment shows the topic, number of problems required, due date, and your current score. Clicking into an assignment presents you with one problem at a time.

You type your answer (for numerical answers) or select from options (for multiple choice). If correct, you get a green checkmark and move on. If incorrect, you see a red X, and depending on your teacher's settings, you may see a worked example of a similar problem. You can then attempt a new version of that problem type.

Your score is calculated based on the number of problem types you have mastered (gotten correct), not the total number of attempts. So if you get a problem wrong three times before getting it right, that still counts as mastered. This encourages students to keep trying rather than giving up after one wrong answer.

What Subjects Does DeltaMath Cover?

DeltaMath covers a wide range of math subjects typically taught in American middle and high schools:

• Middle School Math — fractions, decimals, percentages, ratios, proportions, basic equations
• Pre-Algebra — integers, order of operations, basic expressions and equations
• Algebra 1 — linear equations, inequalities, systems of equations, polynomials, factoring
• Geometry — angles, triangles, circles, area, volume, proofs, coordinate geometry
• Algebra 2 — quadratics, exponentials, logarithms, rational functions, complex numbers
• Trigonometry — unit circle, trig functions, identities, law of sines and cosines
• Pre-Calculus — limits introduction, sequences, series, polar coordinates, parametric equations
• AP Calculus AB/BC — derivatives, integrals, differential equations, series convergence
• AP Statistics — probability, distributions, confidence intervals, hypothesis testing

Tips for Students Using DeltaMath

Practice Math for Free

Want to practice math without needing a teacher code or login? Our free interactive tool lets you practice algebra, fractions, linear equations, geometry, exponents, inequalities, and volume with instant feedback and step-by-step solutions. No account needed — just pick a topic and start solving.

Related Resources

• DeltaMath Answers — Free Step-by-Step Solver
• DeltaMath Login Guide — How to Sign In
• DeltaMath for Teachers — Setup & Tips
• DeltaMath Hacks — Tips & Study Strategies