Complete table of contents for ages 6-7
Book 1 - Addition and Subtraction up to 10 1
Book 2 - Addition and Subtraction up to 10 2
Book 3 - Addition and Subtraction up to 10 3
Book 4 - Addition and Subtraction up to 20 1
Book 5 - Addition and Subtraction up to 20 2
Book 6 - Addition and Subtraction up to 20 3

Overall step configuration

Kids' Fundamentals (ages 5, 6, 6, 7, 7, 8)
Easy and fun way to study math
The last 5 days of each week for 5-6 year olds are “Thinking Pang Pang” to develop thinking skills in a fun way.
Problems are composed of everyday objects such as elevators, marbles, candy, and fingers.

1st and 2nd grade principle calculation
6 volumes, 5 weeks per volume, step-by-step structure. Learning principles through numerical models, such as number bars, vertical lines, and scales. Various applied operations. The final unit of the 5th week is focused practice: "Challenge! Calculation King."

3rd and 4th grade principle calculation
4 volumes, 6 weeks per volume
Principle study and practice of various calculation methods
Two of the six units are focused on practice: “Challenge! Calculation Master!”

5th and 6th grade fundamental arithmetic
A total of 4 volumes for an integrated grade, each volume consisting of 6 weeks
Considering the small proportion of calculations in 6th grade, 5th and 6th grades were integrated.
Learn the principles and practice various calculation methods
Two of the six units are dedicated to intensive practice: "Challenge! Calculation Master."

Preliminary Secondary Principle Calculation
Two volumes of preparatory middle school principle calculations that make it easy to study mixed calculations of rational numbers and equations, which are difficult for first-year middle school students.
Two of the six units are dedicated to intensive practice: "Challenge! Calculation Master."

Mathematics is based on principles
Mathematics is an abstract discipline that expresses the relationships between concrete objects using numbers and symbols.
This is the biggest reason why children have difficulty with math.
This mathematics can only be powerful when accompanied by a proper understanding.
In mathematics, principles are most important at any stage.

Changes in mathematics education
The era of math education where you only need to know how to get the answer is over.
When it comes to calculations, I believe that it is more important to use a variety of solving methods rather than just practicing one method repeatedly.
Textbooks teach why things should be done that way and encourage students to think of various methods, but students forget the principles and mechanically come up with answers through simple, repetitive practice, resulting in a lack of understanding of the applied content.

Operational learning is constant
Depending on the learning stage of the elementary school, it consists of 4 to 6 volumes, so you can study consistently for 10 minutes every day.
Learning the principles and various methods is fun with pictures, and practice is done using an app to help you focus while timing yourself and comparing your results with those of other students.
If you study consistently with a daily study volume that is not burdensome, you will find that your calculation skills have improved significantly before you know it.

The revised version of the principle of calculation is
We have maintained the principles of the existing principle calculation and various solution methods, while ensuring sufficient practice.
The original intention of the plan to make studying easy and fun is emphasized, and calculation skills can also be developed more effectively.

Mathematics is based on principles
Mathematics is an abstract discipline that expresses the relationships between concrete objects using numbers and symbols.
This is the biggest reason why children have difficulty with math.
This mathematics can only be powerful when accompanied by a proper understanding.
In mathematics, principles are most important at any stage.

Changes in mathematics education
The era of math education where you only need to know how to get the answer is over.
When it comes to calculations, it is important to have a variety of solution methods rather than just practicing one method repeatedly.
Textbooks teach why things should be done that way and encourage students to think of various methods, but students forget the principles and mechanically come up with answers through simple, repetitive exercises, resulting in a lack of understanding of the applied content.

Operational learning is constant
Depending on the learning stage of the elementary school, it consists of 4 to 6 volumes, so you can study consistently for 10 minutes every day.
Learning the principles and various methods is fun with pictures, and the practice is varied, but the ending is focused.
If you study consistently with a daily study volume that is not burdensome, you will find that your calculation skills have improved significantly before you know it.

The revised version of the principle of calculation is
We have expanded video lectures and strengthened the elementary school upper grades principle learning process to make it easier to understand principles, concepts, and calculation methods, and have strengthened practice to enhance the completeness of learning.

I hope that parents' concerns about learning arithmetic can be resolved through the principle of arithmetic.
Mathematics is based on principles
Mathematics is an abstract discipline that expresses the relationships between concrete objects using numbers and symbols.
This is the biggest reason why children have difficulty with math.
This mathematics can only be powerful when accompanied by a proper understanding.
In mathematics, principles are most important at any stage.

Changes in mathematics education
The era of math education where you only need to know how to get the answer is over.
When it comes to calculations, it is important to have a variety of solution methods rather than just practicing one method repeatedly.
Textbooks teach why things should be done that way and encourage students to think of various methods, but students forget the principles and mechanically come up with answers through simple, repetitive exercises, resulting in a lack of understanding of the applied content.

Operational learning is constant
Depending on the learning stage of the elementary school, it consists of 4 to 6 volumes, so you can study consistently for 10 minutes every day.
Learning the principles and various methods is fun with pictures, and the practice is varied, but the ending is focused.
If you study consistently with a daily study volume that is not burdensome, you will find that your calculation skills have improved significantly before you know it.

The revised version of the principle of calculation is
We have expanded video lectures and strengthened the elementary school upper grades principle learning process to make it easier to understand principles, concepts, and calculation methods, and have strengthened practice to enhance the completeness of learning.

I hope that parents' concerns about learning arithmetic can be resolved through the principle of arithmetic.