AI math tutor · for students in grades 5–11 · OGE and EGE exam prep
If a topic has already been explained to your child and the mistakes keep coming back, the problem may not be in that topic at all. StudyNinja knows how school knowledge fits together, and with every answer it understands better what this particular student already knows. So it finds the cause of the difficulty, helps the student work through exactly that, and checks that the material has really been mastered.
First two weeks free · Lessons are in Russian
Others see the mistake.
StudyNinja looks for where it came from.
Why “go over the topic again” doesn’t help
Two students solved the same equation and both got a wrong answer. From the outside, it looks like the same mistake. The causes are different.
Problemx² − 6x + 9 = 0
First student
(−6)² − 4·9 = −36 − 36
Calculates the discriminant and loses the sign: a negative number squared stays negative.
Where the cause really is
Rebuild the foundation. Without it, the stumbling will continue in the topics that follow.
Second student
x² − 6x + 9 = (x − 3)(x + 3)
Solves by factoring and mixes up the formulas: the square of a difference turns into a difference of squares.
Where the cause really is
The foundation is fine — one missing link needs to be closed.
“Go over quadratic equations again” won’t help either of them. A teacher sees the grade and the mistake. To help, you need to see the cause — and the next step is different for each student.
How StudyNinja finds the cause
Not just a list of school topics. The system knows which knowledge other knowledge depends on: topics, skills, solution methods, worked examples, common mistakes — and what builds on what.
This is the StudyNinja knowledge graph
With every answer, the system refines its picture: what the student can already do, where the mistakes are, how confidently they know the material, how many attempts it took and how much help they need.
This is how the student’s knowledge model takes shape
The graph knows what needs to be known. The model knows what the student already knows. The next step is born where they meet.
Where they meet
Let’s go back to the second student from the example above.
The system’s conclusion
There’s no point in explaining quadratic equations again right now.
First — special product formulas.
No need to review polynomials: they are already mastered.
StudyNinja builds the same picture for any student. A short check finds the weak link and shows where to start.
Start for freeWhat follows from this
If an old gap is in the way, we close it first instead of explaining the current topic a second time.
The next topic is chosen based on what builds on what — no jumping over what’s missing.
One the student can handle right now: not so easy that it’s boring, not so hard that they give up.
Sometimes a hint is enough; sometimes it takes another example or a detailed walkthrough. After several mistakes in a row, the help increases.
How a lesson goes
We show the principle and walk through an example — briefly, one solution method at a time.
The student takes each step; the system points out where they went off track.
Applies the method to new problems without hints.
We look at the answer and, where the solution is written out step by step, at the reasoning itself.
The goal is to get the student to their own solution, not to show the answer faster.
What happens after a lesson
Before the lesson
Mixes up the formulas
An explanation, solving together, and a few problems solved independently
After
Mastery confirmed
The system makes its next decision with this result in mind: now it’s time to return to quadratic equations. And after a while, StudyNinja will come back to the formulas and check that they haven’t been forgotten.
What students come with
StudyNinja works out what foundation the topic needs and helps make sense of the topic itself.
It helps find the place where the solution broke down and keep going — or first sort out the topic behind it.
It shows which topics are pulling the grade down and helps close them one by one.
It works out what needs to be mastered for the OGE or EGE and leads to the goal step by step.
These aren’t four different products. The same thing works behind each goal: how the subject is built + what the student already knows + what their goal is.
That’s why
StudyNinja adapts learning not to an “average student” but to what this particular student knows right now.
Under the hood
topics · skills · solution methods · worked examples · common mistakes · what builds on what
what’s mastered · how confidently · how many attempts · where help is needed
refined after every answer
grade · school curriculum · official OGE and EGE topic lists · the goal the student has set
explains, gives hints, checks and guides step by step — inside this structure, not on its own
What it costs
Base helps with the current school curriculum; Exam prepares for the OGE and EGE exams.
For everyday schoolwork
₽2,490/mo
per child
First two weeks free
When the OGE or EGE exam is ahead
₽3,990/mo
per child
First two weeks free
The subscription can pay for itself: for everyone who subscribes through your link, you get back 15% of what they pay. How Invite & Earn works
Lessons, exercises and the tutor’s explanations on the platform are in Russian and follow the Russian school curriculum. The platform interface is available in English.
For teachers and tutors
All your students in one list: you can see who has been studying, what they’ve covered and where they’ve fallen behind. Teacher access is free — however many students you work with.
Right now StudyNinja covers math for students in grades 5–11 of the Russian school curriculum, including preparation for the OGE and EGE — Russia’s state exams after grades 9 and 11.
This website and the platform interface are available in English. The lessons, exercises and the AI tutor’s explanations are currently in Russian and follow the Russian school curriculum.
With whatever is needed right now: a difficult topic, a homework assignment, preparation for a test or an exam. If it isn’t clear where exactly the gap is, you can start with a knowledge check.
No. StudyNinja doesn’t just answer questions: the system works out what needs to be learned, breaks it down into concrete steps and guides the student through an explanation, a walkthrough and independent practice.
One lesson takes about ten minutes. You can study a little every day or do several lessons in a row.
No. StudyNinja runs right in the browser — on a phone, tablet or computer.
Yes. The first two weeks are free. And without signing up, you can practice right now with the free study tools (available in Russian): memorize a definition or a poem, or test yourself on dates and facts.
A short check shows exactly where the student is stuck and where best to begin. From there, it’s a clear step-by-step path.
First two weeks free
