1. Teachers: There are more teachers in three primary schools than in one primary school. The three primary schools have more teacher resources and educational background, received more professional training and have more teaching experience. It can better meet the learning needs of students. The number of teachers with professional titles in a primary school is small, and the learning background of colleges and universities is less than that of three primary schools.

2. Teaching facilities and resources: The third primary school has sufficient teaching facilities and resources, such as laboratories, libraries and multimedia classrooms. It helps to provide a richer learning environment and stimulate students' interest and creativity in learning. The first primary school has outdated teaching equipment and traditional teaching methods.