9 grades x 10 units = 90-level systematic curriculum. AI analyzes your child's level and weaknesses to create new worksheets daily. Print, solve with a pencil, then snap one photo for instant AI grading.
Fully aligned with the national math education curriculum. Follows grade and semester unit structure.
1,500 problems | 10 units
Sample PDF1,500 problems | 10 units
Sample PDF1,500 problems | 10 units
Sample PDF1,500 problems | 10 units
Sample PDF1,500 problems | 10 units
Sample PDF1,500 problems | 10 units
Sample PDF1,500 problems | 10 units
Sample PDF1,500 problems | 10 units
Sample PDF1,500 problems | 10 units
Sample PDFAI selects different problems each time and remembers your child's learning history.
Just snap a photo of the finished worksheet and AI grades it instantly, organizing wrong answers and feedback. No more grading by hand.
Classifies problems across cognitive and subject areas and auto-detects weak spots. Uses Spaced Repetition to re-test missed problems at 1, 3, 7, 14, and 30-day intervals.
Print PDF worksheets and solve with a pencil. Connect your printer directly from the app or download PDFs. Color/B&W economy mode available.
Each unit offers 3 difficulty levels: Basic / Intermediate / Challenge. AI analyzes learning history to automatically recommend the optimal difficulty for the next worksheet.
Solve math problems within a 90-day story across 2 themes (Nature Adventure, Unicorn Fantasy). Customize your own character and unlock new chapters daily.
Analysis of TTOBAK math curriculum alignment with national standards.
Accurately follows the grade-semester-unit structure of the national math curriculum. Covers all 90 units across 9 grades x 2 semesters x 5 units.
Each unit features concept explanation + 3 worked examples + 150 practice problems. Completes the learning cycle: understand → follow along → practice.
Combines Spaced Repetition with tag-based weakness analysis. Re-tests problems after 14-day cooldown with weighted emphasis on weak tags.
60% of all problems are written/descriptive, suitable for developing critical thinking. Word problem ratio increases with grade level.
RPG story worlds (9 worlds), boss level system, collection, character expression changes — gamification elements that sustain learning engagement.
Check out real worksheets generated by our learning engine. Download PDFs and print them out.
See the difference at a glance.
| Feature | Paper Worksheets | Tablet Apps | TTOBAK |
|---|---|---|---|
| Curriculum Coverage | Partial | Partial | 90 units fully covered |
| Custom Problem Selection | X Fixed | Some | AI Adaptive |
| Auto Grading | X By hand | Some | AI Photo Grading (OCR) |
| Weakness Analysis | X | Basic | AI Weakness Analysis |
| Spaced Repetition | X | X | 1/3/7/14/30 day cycle |
| Screen-Free | O | X (Screen dependent) | PDF Print Learning |
| Parent Guide | X | X | All units covered |
| Story/Game Elements | X | O | Story Adventure + Collection |
| Cost | $20-50/mo | $10-30/mo | Free · Plus ₩4,900/mo |
"My child used to get bored with the same worksheets, but with TTOBAK, the dinosaur stories make them want to solve problems first. They say math is fun now!"
Mom of 7yo | Grade 1
"They picked up a pencil instead of a tablet. When it prints right away, my kid says 'My worksheet is ready!' Screen time has dropped dramatically."
Dad of 6yo | Kindergarten
"They think checking answers with QR is so cool — they want to grade their own work. The parent guide helps me know how to explain things too."
Mom of Grade 2 boy
Yes, you can generate up to 1 worksheet per day for free. Unlimited worksheets, OCR auto-grading, and the learning analytics dashboard are available with TTOBAK Plus (7-day free trial, then ₩4,900/month).
We support 9 grades from elementary Grade 1 through middle school Grade 9. Each grade has 10 units, totaling 90 levels.
You can download the PDF and print at a convenience store or print shop. The app also has a PDF save function.
Yes, our curriculum follows the same grade-semester-unit order as the national education curriculum. You can learn in sync with school progress.
You can create multiple child profiles under one account. Each child's learning history and difficulty are managed independently.
It analyzes your child's accuracy and weak tags in real-time. Missed problems are re-tested at 1, 3, 7, 14, and 30-day intervals using spaced repetition, with extra weight on weak areas.
Math worksheets perfectly matched to your child's level. TTOBAK creates new ones every day.