deltamath.com
DeltaMath.com is a math practice and assessment website built mainly for teachers and students who need structured problems, fast feedback, and clear progress data.
What is DeltaMath.com used for?
DeltaMath lets teachers create online math assignments while the system checks student answers automatically.
Students solve randomized problems, so they can practice the same skill many times without seeing the exact same question.
When an answer is submitted, the platform can give an immediate explanation instead of showing only correct or incorrect.
Teachers can then see detailed data about student work, including results, progress, and timestamps.
The content library now contains more than 2,500 skills covering math from lower elementary levels through 12th grade.
The site includes normal answer questions, guided problems, graphing, timed exercises, discovery activities, geometric proofs, and interactive geometric constructions.
This makes DeltaMath more than a digital worksheet because many problems require students to interact with mathematical ideas on screen.
Why has DeltaMath become popular with teachers?
DeltaMath began as a teacher-built project rather than a large education software product.
Founder Zach Korzyk created the first version in 2009 while working on a program that helped students practice the quadratic formula.
According to the company's history, DeltaMath reached about 180,000 teacher users and 10 million student users per year by 2026.
A major reason for that growth is the useful free teacher plan.
The free version includes unlimited assignments, unlimited student practice, more than 2,500 problem types, automatic grading, student data, progress information, assignment sharing, and Google sign-in.
That is a strong starting point for a teacher who wants practice software without first asking a school to buy a license.
DeltaMath also gives teachers fine control over what students practice, which can make an assignment closely match what was taught in class.
What do the paid DeltaMath plans add?
Schools can upgrade from the free Teacher plan to PLUS or INTEGRAL, with pricing based on the school or district.
PLUS adds features such as instructional videos, tests, automated test corrections, problem subtypes, custom questions, student groups, co-teachers, folders, standards mapping, and Google Classroom integration.
INTEGRAL adds deeper school technology support, including Canvas, Schoology, Infinite Campus Learning Suite, Clever, and ClassLink integrations.
It also adds tools such as printable assignments, student-work uploads, shared assessments, bulk data exports, and performance reports.
These plans show an important part of DeltaMath's business model: teachers can start free, while schools pay for workflow, assessment, integration, and administration tools.
Can parents use DeltaMath at home?
DeltaMath now has a separate DeltaMath for Home product for families.
As of August 2026, the standard Home price shown by DeltaMath is $9.95 per month for one learner or $95 per year, with additional learners costing $4.95 per month each.
The company also offers a seven-day free trial for the Home service.
This expands DeltaMath beyond teacher-assigned homework because parents can use the same style of targeted practice outside a school account.
Is DeltaMath good for learning math?
DeltaMath looks strongest as a practice, feedback, and assessment tool rather than a full replacement for a teacher or complete math course.
That conclusion comes from how the product is built around problem sets, repeated practice, immediate explanations, assignments, tests, and progress tracking.
Its biggest strength is precision because a teacher can choose exactly which skill or problem subtype a student should work on.
Its possible weakness is the same thing because repeated problem solving can feel demanding for students who need a slower explanation before they begin independent practice.
The paid instructional videos help with that gap, but DeltaMath still works best when practice is connected to good teaching.
Is DeltaMath safe for student accounts?
DeltaMath publishes specific student privacy rules and says school student data is kept confidential.
Its terms state that student data is not used for targeted advertising.
The company also says inactive student accounts and personally identifiable information are deleted after two years of no use.
For accessibility, DeltaMath says its student application is designed around WCAG 2.2 and includes tools such as screen-readable content, graph tracing, keyboard controls, captions, high-contrast mode, and Braille options.
What makes DeltaMath.com different?
DeltaMath's clearest advantage is that it combines a very large math problem library with tools teachers actually use every day.
It does not appear designed to turn math into a game.
Instead, it focuses on choosing the right skill, giving students enough practice, showing mistakes quickly, and helping teachers see what happened.
That simple focus explains why DeltaMath.com has become useful at both the individual classroom level and the district level.