When selecting instructional videos for ourselves or for our children or our students, we should look for those in which the teacher’s hands are visible and active. And if we ourselves are called upon to teach online—or even just to communicate via Zoom or another video-conferencing platform—we should make sure that others can see our moving hands. Research suggests that making these motions will improve our own performance: people who gesture as they teach on video, it’s been found, speak more fluently and articulately, make fewer mistakes, and present information in a more logical and
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