In today's class, we talked about Audio. I just got one more thought about the advantage of Audio. It helps to expand the students' ability to imagine, too. For instance, when you are listening to a speech, I believe there are not just sound waves haunting in your brain, you also try to imagine the scene simultaneously. The speaker's facial expression, body guestures, etc. If there are audience listening to the speech, are they throwing bottles to the speaker or keeping nodding their heads. Or, imagine what's in your head when you are listening "The Carnival of the Animals" by Camille Saint-Saens.

From this point, I'm thinking maybe I should generalize it to other formats as well, such as Text (think about when you are reading a novel, those characters are live people in you head, rather than the plain names "James" or "Rachel"), Video, Visual products, etc.

My point is when using all of these technology products/tools, we also should pay some attention to the skills and abilities unobservable or difficult to evaluate. It's kinda against the rule of instruction, it's good for the development of students though.