Virtual classroom by sharing terminal over ssh using screen

In today’s world, all learning methods are based on remote locations. Considering the case with GNU/Linux, remote learning on topics like System Administration, Networking etc involves the execution of different commands from shell. Mere writing these commands in a tutorial sheet and passing it over does not make sense. Then what else we can do? Good question. Take an example of a Mathematics classroom. There students could see what are the different steps that teacher is performing inorder to solve various problems via white board/black board. Here this board will be placed in a position to be seen by everyone inside the classroom. How can we make use of the SCREEN tool in the light of above mentioned example?

What is screen?
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