How to verify abacus mental arithmetic teacher?

Abacus mental arithmetic teachers can pass the national examination for abacus mental arithmetic coaches.

Basically, there are two aspects: one is to enable students to master the necessary mathematical knowledge and skills in social life; The second is to have good mathematical quality.

Abacus mental arithmetic:

The so-called abacus mental arithmetic is abacus mental arithmetic. Abacus calculation is a calculation method that uses abacus as a tool to perform operations such as addition, subtraction, multiplication, division and square root. There are certain rules and formulas in the skill of transporting beads. When the user can skillfully operate the abacus, he can not only get the correct answer quickly, but also describe the disk type, grade and floating change of the abacus in his mind.