1, personalized teaching: One-to-one teaching can customize the teaching plan according to the individual needs and characteristics of students, ensuring that the teaching content and speed are most suitable for individual students, while one-to-three teaching can hardly take into account the uniqueness of each student.

2. Pay more attention: In one-on-one teaching, the teacher will focus all his attention on one student. He can pay attention to the students' reaction and understanding in time and give appropriate guidance and feedback. In contrast, one-to-three teaching leads to less attention to each student.

3. One-to-one teaching is a very personalized education method, which provides tailor-made teaching plans and methods according to the characteristics and needs of each student. This teaching mode originated from the end of last century to the beginning of this century, and gradually developed into an important branch of modern education.