|“I can't get over how small you are!”
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Learn With Portals is an educational project by Valve Corporation, utilising their Portal franchise to help teach physics and critical-thinking skills. The project was announced on the 15th September 2011, and to promote it Portal was made free until the 20th September 2011.
The Evergreen School Visits Valve
The project was announced with an accompanying video, The Evergreen School Visits Valve.