Recording lectures to replay later has shown to have no added benefits compared to paying attention the first time without the possibility of watching it again.
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In an experiment, students were given Ted Talks to watch and were told to take notes, half with laptops, the other with pen and paper.
When the instructor says 'this is important' or 'note this', or gives a non-verbal cue that the content being discussed is important, it can enhance the student's note-taking. They can also listen to the cues to help them organize their lessons.
Using a laptop is not an ideal way to take notes or to learn, during a lecture.