What are the main features of the mechanical teachers and the schoolrooms that Margie and Tommy have in the story?

Margie and Tommy had mechanical teachers. They had large black screens on which all the lessons were shown and questions were asked. They had a slot in which students had to put their homework and test papers. They had to write their answers in a punch code and the mechanical teacher calculated the marks immediately. Their schools were in their homes itself. They did not have any classmates. They learned geography, history and arithmetic. They had regular days and hours for school. Margie’s school was right next to her bedroom. The mechanical teacher always turned on at the same time every day except Saturdays and Sundays because her mother said that little girls learned better when they learned at regular hours.

For more answers visit to website:
https://www.tiwariacademy.com/ncert-solutions/class-9/english/beehive-chapter-1/