Dr. C. Beulah Jayarani discusses the critical role of teachers in education and nation-building, emphasizing that effective teaching hinges on the teachers' mastery of their subject and the ability to engage with students. The document outlines the essential qualities and skills required for biology teachers, including communication, knowledge of teaching methods, and a strong grasp of psychology related to education. Additionally, it highlights the importance of planning and professional enrichment for teachers to effectively guide students and promote scientific understanding.