For soroban teachers — the app that makes what happens outside the lesson visible
Between lessons two or three times a week, you cannot see how a student is practicing at home. Soroban Kingdom is the app that fills that gap. It fits teaching with a real soroban exactly as it is, and when you get one wrong, the bead move that most likely went wrong (worked out from the answer) is shown in a diagram. A school plan covers what students use at home (families pay nothing extra).
- Try the teacher screen first — free for 14 days, no credit card, up to 10 students. Open the teacher screen
- If you want to continue, choose a plan — see pricing ▼
How Soroban Kingdom helps teachers
| What you get | Why it matters |
|---|---|
| 🇯🇵 The authentic Japanese method | Built on the Japanese soroban curriculum — kyu and dan levels, test formats and bead technique as taught in Japan, where the method comes from. |
| 🔍 Error-pattern diagnosis | From each wrong answer, works out the bead move that most likely went wrong (5-complements, 10-complements, carrying), per student. It is a clue for your next lesson, not a record of the student's hands. |
| 🎓 Certificates | Printable certificates in a Japanese-style design after passing the SK Test. Parents share them — free word of mouth for your school. |
| 🧩 Fits your curriculum | Choose the level system your school follows. Soroban Kingdom is a tool for your school, not a rival programme. |
| ⏱ Less work for teachers | Homework sent and graded automatically, and a daily list of students who need attention. |
What you can use right now
🖨 Homework worksheets: pick a level and a subject and get as many test-format question sheets as you like, with answers. Every sheet is different.
🏅 Mock test (SK Test): a time limit per subject, marked all at once. More about this.
🔍 Likely bead mistakes, as diagrams: not just right or wrong — for each student, a diagram of where it most likely broke down (friends of 5, friends of 10, carrying, and so on), worked out from the answer.
✋ About finger movement: Thumb and index finger: when to use each with diagrams, right down to the reason. Parents can teach it at home.
⚡ Flash Anzan, mental math, today's practice: a routine that keeps the test menu going every day (mental math 3 min × 3 → multiplication → division → addition).
How a school can use it
| Where | How to use it |
|---|---|
| Homework | "This week: 5th Kyu addition, 3 sets" → students do it in the app. Worksheets work too. |
| In the lesson | Flash Anzan and time attacks on each child's own device. For online lessons it is faster than screen sharing. |
| Deciding on a promotion | Decided by looking at accuracy and time per level, and mistake habits. |
| Explaining it to parents | A weekly practice card and certificates. "My effort shows" — so they keep going. |
| Trial lessons and joining | Hand the app to a child who comes for a trial lesson. It says: this is a school where it is easy to keep going at home. |
The teacher screen for schools
The teacher screen is ready to use."Sign in with Google" → enter your name (1 minute; email and password also work) → create a class → enter the students' nicknames → print the login cards. Children just enter the code and pick their name.
Practice made visible per student, homework handed out and marked automatically, and a list of students to talk to (needs follow-up / struggling / ready to move up).
Students need a nickname only (we do not collect the child's real name or date of birth). The teacher registers the students, prints a login card for home, and hands it over. At home, a parent signs in with a Google account and enters the key from the card just once.
Guides for teachers
- Free printable: soroban mistake observation sheet (one page, 20 students, no sign-up)
- 7 things to check before paying for abacus class software
- Tracking 20 students' mistake types without a spreadsheet
- Moving homework from the workbook to a screen, keeping the real abacus
- Between lessons: seeing what students do at home
- A flash anzan progression that climbs without stalling
- How to read a child's mistakes · Homework that gets done · Grading systems compared
Pricing
Levels 20–16 are free forever — no sign-up. From 15th Kyu up: a school plan (Studio $149/month and up).
Try it free for 14 days — no credit card needed. It simply stops after 14 days. If you subscribe, billing starts that day.
| Plan | Monthly | Yearly (save 2 months) | Students |
|---|---|---|---|
| Trial (no credit card) | $0 for 14 days | — | up to 10 |
| Studio | $149 | $1,490 | up to 40 |
| Academy | $349 | $3,490 | up to 150 |
| Franchise | Contact us for multi-school pricing | 151+ | |
Prices are in US dollars. Sales tax or VAT may be added at checkout, depending on where you live. The first payment is taken on the day you subscribe, then automatically on the same date every month (every year for yearly plans). Cancel any time from the customer page: the plan stops at the next renewal date and you can keep using it until then. No pro-rated refunds.
A school plan includes everything your students use at home — families pay nothing extra. Studio works out at under $4 per student per month, less than a single lesson. Families who don't attend a school can use the Home plan ($29/month).
Subscribe
Pay by credit card through Stripe. Please use the same email address as your teacher screen; your plan is applied automatically within minutes (1 business day at the latest).
Cancel or change your credit card any time from the customer page. Legal notice (Japan) · Terms · Contact
Founding Partner schools
The first 20 schools outside Japan get the Studio plan for $99/month for 12 months (regular price $149), plus a direct line to the developer. In return, please send us a short note once a month about what works and what doesn't. Before we mention your school as an example, we will always ask you first.
✉️ Apply or ask a questionEmail [email protected] with your school's name, country and number of students. We reply within 2–3 business days. Questions are welcome too.
Soroban Kingdom is an independent practice app developed in Japan. It is not affiliated with any abacus examination body or franchise, and works alongside any school's method.
Levels 20–16 are free forever — no sign-up. Try "🖨 Make a worksheet" and "🏅 SK Test" to see how it fits your classes. The teacher screen is free to try for 14 days (no credit card).
▶ Open Soroban KingdomFounding Partner applications here ▲