Generally speaking, the working space of teachers is mainly indoors, including classrooms and offices. However, due to the diversity of students' development factors and the comprehensiveness of educational purposes, students' growth is not only influenced by schools, but also by society and families. Therefore, both inside and outside the classroom and inside and outside the school may become empty questions for teachers' labor. Teachers should not only exert their influence in the classroom and in the school, but also go out of the school, make home visits and street visits, coordinate the educational influence of the school, society and family, and form a joint educational force. Sometimes, according to the teaching needs, students are guided to enter the society to carry out social practice education, so as to better achieve the educational purpose. Therefore, teachers' labor has spatial extensiveness.