Gae-yu is composed of two book sets designed to allow students to effectively study and drill math concepts. By featuring circles, which represent stability and completeness, the Gae-yu cover design alludes to the value of being both intuitive and impactful. The circles’ 'mysterious' color patterns express the brand identity 'synergy up'. This concept is further reflected by the cover designs of complementary semicircles and colors which can combine to form a complete circle with a unique color patterns as full set.

In order to enable the children to lead diverse learning activities by themselves, VISANG has been endeavoring to make the perfect study materials. As a result, VISANG workbooks recorded the sales of over 100 million copies until now. By doing so, VISANG workbooks have become located as a perfect partner ideal for self-learning. In order to enable everyone who desires to learn without settling for textbooks, VISANG offer equal opportunity for our education without any conditions. It's fame continued by introducing the masterpiece textbooks, which contain the Ministry of Education's vision and the values of VISANG based on the know-how of VISANG only. Publishing the national textbooks for elementary schools starting 2016 using top editorial manpower and the latest printing facility, it has been receiving recognition for its capabilities regarding textbooks, its development of the teaching materials, the editing, and its publications despite its short history.

In order to enable the children to lead diverse learning activities by themselves, VISANG has been endeavoring to make the perfect study materials. As a result, VISANG workbooks recorded the sales of over 100 million copies until now. By doing so, VISANG workbooks have become located as a perfect partner ideal for self-learning. In order to enable everyone who desires to learn without settling for textbooks, VISANG offer equal opportunity for our education without any conditions. It's fame continued by introducing the masterpiece textbooks, which contain the Ministry of Education's vision and the values of VISANG based on the know-how of VISANG only. Publishing the national textbooks for elementary schools starting 2016 using top editorial manpower and the latest printing facility, it has been receiving recognition for its capabilities regarding textbooks, its development of the teaching materials, the editing, and its publications despite its short history.