But where we stand today is equal in the eyes of the law, unequal in the eyes of the children, and it is up to us to finish the work. There is no scalable technology that can teach a child to read, only a teacher can do that; there is no law that can make kids love the wonder of mathematics; only a teacher can do that, there is no judge who can order a child to believe in herself against all evidence to the contrary; only a teacher can do that.
I don't understand the meaning of 'scalable' here. what does that sentence mean? Does that mean 'techonology is not comparable to teacher'?