I feel smart teaching is also by a teacher by using audio visual aids. Without teacher no teaching. In earlier days teachers orally explaining the concepts to students with examples. He was used to write important points on the black board using a chalk piece. Students used to note down important points.
You remember more the instances you have seen rather than what you hear. Cinema is a best example for this. If you see a movie once, you will remember the story for long. If you read it multiple times you may remember. So to improve the awareness among the students now a days schools are trying to use electronic gadgets like TV, smart phone, VCP etc.s for the advantage of the students. But not without the teacher . The teacher will explain the concept and made the students to observe the video and clarify their doubts if any. Definitely this will be a better method of teaching. But without teacher, only smart teaching is not good.