04/22/2026
Sonya is learning the final steps of adding and subtracting on the abacus. Next up: multiplication!
Let’s Abacus
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We equip students to excel in math and LIKE math by teaching abacus-based mental math classes. Send us a message to schedule your free trial lesson today!
We offer in person classes in San Francisco and online classes for students from anywhere!
04/22/2026
04/14/2026
From the 2025 IAC (International Abacus Classic)!!! The 2026 IAC, hosted by is coming up on 8/1-2 in Portland, OR. Register by 4/30. It is a 2 day event, that includes activities & competition, and of course, medals and trophies.
Very late congratulations to Let’s Abacus students who participated in the 2025 IAC held in Costa Mesa, CA.
Jessica Wong
🏆1st Abacus Dictation
🏆1st Anzan Dictation
🏆2nd Grand Prix
🏆2nd Global Comprehensive
🏆2nd Soroban League Comprehensive
Emily Wong
🏆1st Grand Prix
🏆1st Global Comprehensive
🏆1st Soroban League Comprehensive
🏆2nd Abacus Dictation
🏆2nd Anzan Dictation
Dylan Wong
🏆1st Abacus Dictation
🏆2nd Global Comprehensive
🏆2nd Soroban League Comprehensive
🏆2nd Anzan Dictation
Cory Wong
🏆5th Global Comprehensive
🏆Bronze Anzan Dictation
🏆Bronze Abacus Dictation
Congratulations to these siblings who continue to work hard despite their busy schedules.
Good luck to the 4 of you and other Let’s Abacus & league students participating in the 2026 IAC!
Contact us for more information about our program
✉️ [email protected]
📱 (415) 377 - 2589
🌐 letsabacus.com
soroban abacus abacusmath abacusmaths math afterschoolprogram sanfrancisco onlinemath onlinemaths mathclass mathclasses numbers そろばん 暗算 contest flashanzan
02/12/2026
02/12/2026
496! You can calculate square root and cube root on the abacus! 🧮
12/11/2025
Congratulations students for participating in this year’s Correspondence Contest! Smiles all around!! 🧮🏅🥈🎖️
#そろばん #暗算
12/04/2025
Students can start classes at the beginning of any month throughout the year! We offer in person classes in San Francisco and online classes worldwide! Contact us for more information and to schedule a free trial lesson! 🧮🗓️
✉️ [email protected]
📱 (415) 377 - 2589
🌐 letsabacus.com
#そろばん #暗算
12/02/2025
TJ started practicing Anzan today! He can mentally calculate problems he learned with the abacus on his first day just 2 months ago! He is visualizing beads in his head while moving his fingers like he would on an abacus.
✉️ [email protected]
📱 (415) 377 - 2589
🌐 letsabacus.com
#そろばん #暗算
11/21/2025
Congratulations on passing Abacus and Anzan Exams! Students receive certificates and stickers to put on their abacus starting in Level 10 (10 kyu) 😊🧮 Onward and upward!
#そろばん #暗算
11/12/2025
Pin badges from the October Dictation Exams have arrived from Congratulations Maru for passing Level 6 (6 Kyu) Oral Abacus and Oral Anzan Exams 🎉🧮 Will you challenge 5 Kyu level in February? 💪🧠
#そろばん #暗算
09/29/2025
The is hosting the annual Correspondence Contest 🧮🏅🎖️ in November! All participating students will receive a medal (Gold, Silver, Bronze or Pewter) This is a great opportunity for qualified students to track their progress, set & meet personal goals, and gain more experience participating in contests. The contest will be conducted during regular class in the first week of November.
#そろばん #暗算
09/17/2025
Oral Abacus and Oral Anzan Exams are coming up soon! Students are you ready to add to your pin badge collection? These exams are a great way to track your progress in Soroban and Mental Calculation Dictation. Open to students who take classes in San Francisco and all online students.
Hosted by through the Abacutor App
09/01/2025
When art & abacus come together to create the perfect abacus bag 😍🎨🖌️🧮
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