Final answer:
A good teacher possesses subject knowledge, effective communication skills, and positive qualities. Schools can retain good teachers by offering competitive salaries, professional development opportunities, and a supportive work culture.
Step-by-step explanation:
A good teacher possesses several qualities that contribute to their effectiveness in the classroom. They should have a strong subject knowledge and the ability to articulate complex concepts in a way that students can understand. Additionally, good teachers are enthusiastic, patient, and empathetic, fostering a positive classroom environment. To retain good teachers, schools should provide competitive salaries and benefits, offer professional development opportunities, and create a supportive and collaborative work culture.