The volume offers a practical manual for teachers in secondary girls' schools, combining three headmistresses' perspectives on intellectual, moral, and organisational life. It surveys subject-specific methods—language, classics, modern languages, mathematics, sciences, history, geography, and the arts—alongside guidance on discipline, school hygiene, timetabling, libraries, apparatus, and extracurricular activities. Emphasising method over theory, it treats curriculum design, pupil development, teacher training, and the school's role in character formation, with concrete precepts, classroom techniques, and organisational recommendations for effective secondary education of girls.