Ключевые слова: advice, background, basic, board, care, chalk, chalkboard, class, communication, contraceptive, control, ed, education, gender, green, health, healthcare, illness, information, instruction, knowledge, learn, learning, lecture, lesson, life, medical, pregnancy, protect, risk, safety, saving, school, sex, sexual, sexuality, sign, study, studying, subject, symbols, system, teach, white, word, written,