Education, Teaching Aid and Training Content Design Joyful Visang Textbooks by VISANG Joyful Visang is a series of elementary school textbooks for mathematics, social studies and science. The textbooks are centred on play and activity to support active participation by students. Each cover reflects the subject content: geometric shapes form familiar objects for mathematics, an unfolding view of the world for social studies, and stories of heroes for science. Rounded corners and an antibacterial coating improve safety. A foldable flap serves as a bookmark, a perforated area allows name writing, and lenticular printing adds a three-dimensional effect.