How is this technique different to the traditional note taking?
In traditional notetaking, I usually write as much as I can during the lecturer’s presentation as I don’t want to miss any contents. In traditional notetaking, I can obtain many new information, and easy to organise them as often re-read the notes I take. However, the disadvantage of doing so is that I dont have enough time to deeply think what the lecturer says (unless he/she stops for a little while). For sketchnoting, it allows me to well consider through the contents during the presentation, then record the central idea of the each aspect within the presentation using a more flexible way (as drawings have much more flexibility than  writings). So that instead of writing notes all the way through the lecture, sketchnoting is relatively a better way. However, as a starter of using sketchnoting, the thinking/reacting of ‘how shall I draw this figure’ also slow my mind down, which resulted me in missing many information during the last sketchnoting session during the last tutorial.
How does this visual approach facilitate communication of your ideas? Conversely, how does it prevent it?
Personally, I think using little drawings where necessary during a presentation will benefit me from no need to write too much information (pure writing) that constrains my thinking style. Little drawings sure will evoke my creativity, which can possibly make me want to continue focusing on the lecture.
In contrast, as I am not very good at drawings, make little drawings during sketchnoting will slow my process of recording information down.
Personal challenges as a sketchnoter
As a starter of using sketchnoting, there are a few challenges:
   1. Because my drawing speed is slow, so I need to make my drawing speed faster.
   2. Be familiar of the common drawing figures, such that I don’t have to use too much time on thinking ‘how to draw them?’
   3. More consideration (in contexts) of what things should I use drawing figures instead of taking notes.