80, 90 in the memory of the desks and chairs are basically fixed, the material is mainly solid wood, and then gradually have steel, plastic and wood combined desks and chairs, with lifting function...

The external environment of a classroom can promote active learning, or it can interrupt it, because the arrangement of the various spatial areas in the classroom can affect the teaching effect. In...

1, maintenance of student desks and chairs, the first need to ensure the circulation of air in the classroom, with a good ventilation environment, the north of the desks and chairs recommended as f...