Look at math through the window of SOMA!  

● Configuration

 - Learning a course 15 minutes per day / 5 days per week / 8 months.
 - The number of assignments worked on in a day is about 15 assignments.
 - 8 books in one course (6 volumes in level D), 
   70 pages in one book to study, so there is no boredom.

● Features
SOMASAEM is the magical arithmetic of SOMA based on principles. Unlike existing calculation
teaching materials that repeat simple calculations, this book is a calculation 
teaching material that allows you to learn principles, 
think about them in an interesting way, 
and study calculation processes with various specific materials or situations.
Each level, consisting of 8 volumes, can be finished by spending as little
as 15 minutes a day and 5 days a week for 8 months,
allowing children to learn without feeling bored.