But the thing is when they are going to write something on the board, my gaze will inevitably fall on them while I try to see what they write on the board. Is it permissible to look at them without any desire in such a case?
………………………………………………………………………..
You must avoid this to the best of your ability. This is how Satan works. He tries his best to make it softer and softer in your heart until you transform totally and believe that it is permissible.