Prathomsuksa 1-6 Based on the Basic Education Curriculum B.E. 2551. Free Teacher’ s Guide and Answer Keys are provided. This series helps students to • Learn traditional Thai and universal social norms and etiquette. • Analyse numerous situations for decision-making regarding socially acceptable behaviour. • Assess students’ understanding of social values through plenty of exercises. New Special Features are added to help students keep up with the trends in the digital era.