On the Cover

What's the best way to represent "class participation" visually? We rejected the idea of featuring a large class full of students raising their hands. It was a cliche, and not all kinds of participation include speaking aloud. So we chose an engineering schematic from the early 20th century, reasoning that student participation is essential to a well-oiled classroom. The four authors in our special section attest to this principle. Cover image: "Engineering: Large Cogs Meshing Together . . ."/Wellcome Images via Wikimedia Commons.

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