A study from 2011 by Sir Ken Robinson is still useful today for anyone who wants to think outside of the box.
convergent thinking – Sisyphean High
Divergent Thinking in the Classroom - An Overview - ArgoPrep
Paper Clip Test The workshopper
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Are You A Divergent Thinker? Take This Simple Paper Clip, 52% OFF
Paperclip Thinking — Paperclip Thinking LLC
Ora Loapi - DIVERGENT THINKING: THE PAPER CLIP EXERCISE
How to test your product idea before you build it — Moonshots
What Is Divergent Thinking, How to Find If You Have It & How to
7 Fun Exercises to Quickly Improve Creative Thinking