Ключевые слова: 5 october, appreciation, background, blackboard, board, book, border, card, celebration, chalk, chalkboard, class, classroom, college, concept, congratulations, copy, craft, day, draw, education, empty, event, father, graphic, gratitude, greeting, greeting card, happy, holiday, instructor, international, kids, knowledge, learn, lesson, message card, national, poster, school, space, study, teacher, teacher day, teachers day, text, thank, university, word,