For those teaching at home: Since the amount of practice at home cannot compare to that of a soroban (abacus) school, solve the problems, check them with a pencil, erase, and repeat. Alternatively, make copies and practice repeatedly. If you can't do that, you should attend a soroban school. "Tehodoki ABC" is a text for learning the basics of mental addition, similar to "Chibikko Soroban 4" and "Pachi Pachi Land 6." However, this one progresses a bit faster, and there are no cute pictures or mazes. It requires the academic ability of a first-grade elementary school student. The second and subsequent photos show the contents of "Tehodoki ABC." The "10•9th Grade•8th Grade•7th Grade Problem Sets" are problem sets for the Soroban Examination hosted by the Japan Chamber of Commerce and Industry and the Japan Soroban Federation. Of course, the solutions are also included with illustrations. Books are not discounted ❌ (due to copyright law). If you purchase multiple items and save on shipping, I can reduce the price accordingly, but it will not be below the list price. Multiple purchases are welcome! You might save on shipping. #Soronyan Soroban Materials ← You can see all the soroban materials here. Shipping is planned via anonymous "Nekopos" delivery. Please read the profile carefully❗️carefully❗️carefully❗️ and purchase without a comment if you have no questions or want to combine items. Pachi Pachi Land Chibikko Soroban Soroban (Abacus) Problem Sets Textbook Beginner Elementary Soroban Right Brain Activation Anti-Aging Self-Study Home Study Brain Training