My west coast brother has informed me that today is World Audiovisual Heritage Day. Just hearing that brought back memories. Any of you who are retired teachers, or still active teachers or presenters of any kind can relate. In my various careers I have used overhead projectors, movie projectors, slide projectors, split screen Zoom applications, and regular Zoom. I have projected on the big screen from my computer, worked math problems on a white board (the electronic type), and never forget green and black chalk boards and white boards with erasable markers. I've even created Power Point presentations. In other words, I am a survivor of audiovisual experiences through the years. It did not always go smoothly.
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