![A-teacher-uses-a-smartphone,-stands-in-the-school-yard-against-the-background-of-yellow-school-buses.-Side-view](https://videocdn.cdnpk.net/videos/d477b3e4-bd18-457f-a1e9-92f29a0b8989/horizontal/thumbnails/small.jpg)
A teacher uses a smartphone, stands in the school yard against the background of yellow school buses. Side view
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