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there are two major personal tools that come to mind when talking about education, one is pinterest, this app can be use to discover information and be constantly updated, in the case of professors, they can use it to be up to date with aspects involved in their area of study. https://www.pinterest.com/ there is also youtube which is an online platform for videos, this app can also be used by teachers, since youtube is full of tutorials and even lectures that might better prepare the profesors. https://www.youtube.com/