One teaching situation where technology makes a huge improvement in learning or teaching?

In the classroom, the teachers are usually used the word or powerpoint to begening the lecture. Students can take notes and see what is on the lecture easily.
For example, when teacher say people's name they can write down correctly or they can understand when teacher talk about the geography.
Teacher also do not need to draw or memorize all material, they can use technology in order to teach in class.