5 ways the world will be better when teachers are replaced with Robots.
1. Teachers will have optical receptors on the back of their heads, meaning no more spitballs.
2. Teachers would be able to answer any question by way of a central database.
3. Teachers would never have to go to the bathroom.
4. Teachers would never get sick, they broke down all they would have to do is be replaced by another robot.
5. Teachers would never have inappropriate sex with students.

2 ways the world would be worse.
1. Robots are never very good at teaching social studies.
2. Robots can't help teach penmanship to left handed people.