1-Disadventage of electronic device that it can make you distract from your lesson
2-About adventage it make you don't need to write down too much and you can learn faster if you know how to use it wise
3-Its help you find more information from anywhere and can help you do your best answer
4-No, I don't think so. Because they now are too lazy and too rely on internet, other people they don't trying to do so that they can't feel the effort to make out energize