DeltaMath is an online mathematics practice and assessment platform for students in grades 4 through 12, including Calculus. In this DeltaMath review, I look at how the platform works, what teachers can do with it, and where it fits within a broader mathematics program.
The short version is that DeltaMath is especially useful for targeted practice. Teachers select mathematical skills, organize them into assignments, adjust the requirements, and monitor how students perform. The free teacher account is quite capable, while the paid PLUS and INTEGRAL plans add instructional videos, tests, custom questions, integrations, printing, and other school-level tools.
What is DeltaMath?
DeltaMath is a mathematics learning platform built around automatically generated problems. It was created by mathematics teacher Zach Korzyk, who began developing it in 2009 with a program for practising substitution in the quadratic formula.
The platform now covers grades 4 through 12. This is worth noting because DeltaMath was previously associated mainly with middle school, high school, and advanced mathematics. Fourth- and fifth-grade content has since been added. Every teacher account provides access to the complete range of grade levels.
Students normally join a teacher’s class using a registration link or class code. Teachers can then create assignments from DeltaMath’s library of mathematical skills and review student performance.
DeltaMath review of its main features
Large mathematics problem library
The free DeltaMath Teacher plan includes more than 2,500 premade problem types. These cover mathematics from upper elementary topics through algebra, geometry, precalculus, Calculus, and other secondary courses.
The generated problems allow students to practise the same mathematical idea with different values and representations. This is particularly useful when students need repeated opportunities to apply a procedure rather than answer the same fixed worksheet questions.
Customizable assignments
Teachers can combine several skills within one assignment, decide how much work students must complete, and control when the assignment becomes available and when it is due.
Mixed problem sets can be used for cumulative review. Instead of presenting one skill at a time, the teacher can combine several skills and have DeltaMath serve them in a mixed order. This requires students to identify the type of problem before selecting a procedure.
Paid plans provide additional control. Depending on the licence, teachers can choose problem subtypes, assign particular problems, target individuals or groups, allow late credit, and create their own questions.
Immediate feedback and automatic grading
DeltaMath grades student responses automatically and provides immediate information about whether an answer is correct. Many problem types also include worked examples or explanations that students can consult.
This makes the platform useful for independent practice, but teachers need to think carefully about the settings. Immediate correction can support learning when students use it to identify and repair an error. It becomes less useful when students repeatedly guess until the platform accepts an answer.
Detailed student data
The free teacher account includes access to each problem a student attempted or viewed. Teachers can examine the answer submitted, when the student worked on it, how much time was spent, and the student’s most recent activity. Aggregate completion grades can also be viewed and exported.
This is more helpful than a single assignment percentage. A low score may reflect misunderstanding, incomplete work, rushed attempts, or difficulty with one particular skill. The problem-level information gives the teacher a better place to begin a conversation.
Tests and automated corrections
Creating formal tests is a PLUS or INTEGRAL feature. A DeltaMath test differs from a standard practice assignment: assignments are designed around continued practice, while tests provide a more controlled snapshot of current performance.
Teachers can build tests from question banks, selected problem types, specific problems, or their own questions. After a test, DeltaMath can generate an individualized correction assignment based on the questions each student missed.
This is one of the more practical paid features. It connects assessment with follow-up work instead of giving every student the same general review.
Instructional videos
Premium accounts include targeted instructional videos across DeltaMath’s modules. Teachers can also assign YouTube videos and monitor how much of an assigned video each student watched.
These videos can support review or provide another explanation outside class. They should not automatically replace teacher instruction, particularly when students need to compare strategies, ask questions, or explain why a method works.
Custom questions
PLUS and INTEGRAL users can create their own problems. Available response formats include multiple choice, free response, guided sentences, and paragraphs.
This helps when the premade library does not match a lesson closely enough. It also allows teachers to include interpretation and explanation alongside automatically generated procedural questions.
Practical ways teachers can use DeltaMath
DeltaMath can support several familiar classroom routines:
- Independent practice: Assign a small group of skills after explicit instruction.
- Cumulative review: Mix current and previously taught skills so students must recognize which method applies.
- Exit tickets: Use a short assignment or, with a premium plan, a test to check understanding at the end of a lesson.
- Targeted intervention: Assign different skills to individuals or groups based on earlier work.
- Test preparation: Build mixed assignments that revisit the main skills from a unit.
- Corrections and relearning: Use automated test corrections to give each student practice connected to their errors.
I would avoid assigning an unnecessarily large number of questions simply because the system can generate them. Ten carefully selected problems followed by discussion may reveal more than thirty completed mechanically.
DeltaMath plans and integrations
The free DeltaMath Teacher account includes unlimited assignments, unlimited student practice, automatic grading, detailed data, assignment sharing, Google sign-in, and the main problem library.
PLUS adds features such as instructional videos, tests, automated test corrections, custom problems, standards mapping, assignment folders, co-teachers, and Google Classroom integration.
INTEGRAL adds school-oriented capabilities such as Canvas, Schoology, Infinite Campus Learning Suite, Clever, and ClassLink integrations. Depending on the licence, these integrations support rostering, single sign-on, and grade passback. INTEGRAL also adds printable assignments, uploaded student work, shared assessments, and administrative reporting. DeltaMath currently lists school and district pricing as site-dependent, so schools need to request a quote.
DeltaMath strengths and limitations
DeltaMath’s strongest quality is its focus. It is a mathematics platform, and its tools are built around creating, assigning, practising, and assessing mathematical problems. The free account also provides more assignment and reporting functionality than many freemium classroom platforms.
Its main limitation is that repeated correct answers do not necessarily demonstrate deep understanding. Students can learn a procedure well enough to complete a problem type without being able to explain the underlying mathematics or apply it in an unfamiliar situation. DeltaMath therefore works best alongside discussion, modelling, problem solving, written reasoning, and tasks with more than one possible approach.
Accessibility also requires attention. DeltaMath states that most of its content is accessible and documents keyboard and screen-reader support for many interactive elements. However, its current accessibility statement acknowledges that some interactive content remains partly or completely inaccessible through assistive technology. Teachers working with students who use screen readers or keyboard navigation should check the selected activity and consult DeltaMath’s listed alternatives before assigning it.
DeltaMath compared with other math platforms
| Platform | Best suited for | Main distinction | Access |
|---|---|---|---|
| DeltaMath | Targeted mathematics practice and teacher-created assignments | Generated problems, detailed attempt data, tests and individualized corrections | Strong free teacher plan; premium tiers add advanced tools |
| IXL | Broad curriculum practice and diagnostic information | K–12 curriculum, personalized guidance, diagnostics and extensive analytics | Subscription-based |
| Khan Academy | Instruction, practice, and mastery progression | Free lessons, videos, exercises and course mastery tools | Most core educational content is free |
| ALEKS | Adaptive course placement and personalized learning paths | Uses ongoing assessment to determine what a student is ready to learn | Paid licences and trials |
IXL provides a broader multi-subject curriculum and diagnostic system. Khan Academy places more emphasis on instructional content and mastery progression. ALEKS is built around adaptive assessment and individualized course pathways. DeltaMath is the more focused choice when a mathematics teacher wants to select particular skills, generate practice, and inspect students’ work at the problem level.
Final thoughts
DeltaMath is a practical choice for mathematics teachers who need structured practice without creating every question manually. Its free teacher account is sufficient for regular assignments, automatic grading, and problem-level reporting. The paid versions become more relevant when teachers need tests, videos, custom questions, differentiated assignments, or LMS integration.
I would use DeltaMath as one part of mathematics instruction. It can provide repeated practice and useful data, but students still need opportunities to explain their reasoning, compare methods, work through unfamiliar problems, and use mathematics in contexts that cannot be reduced to a generated exercise.
