The Blackboard by Frank Waldo David is a fascinating book about the life of a teacher in an American secondary school. The author describes in detail the daily challenges faced by the teacher, his experiences, joys and thoughtful situations with students. This book impresses with its sincerity and attempt to show the essence of teachers in the modern world. Readers will be able to feel the atmosphere of lessons, immerse themselves in the atmosphere of school relations and understand the importance of the role of teachers in the life of each student. "Klasna doshka" is a book that inspires to take care of quality education and involve oneself in the formation of the future generation.