Main Page and Default Header:
“Puzzle Pieces” by Daniel P. Fleming is licensed under CC BY-SA 2.0
Numerical Reasoning Header and Sidebar Picture:
Photo by CTrades is licensed under CC BY-SA 2.0
Abstract Reasoning Header and Sidebar Picture:
Photo by Annie Spratt on Unsplash
Thinking with Models Header and Sidebar Picture:
Photo by Isaac Smith on Unsplash
Spatial Reasoning Header and Sidebar Picture:
Photo by Victor Garcia on Unsplash
Reasoning with Data Header and Sidebar Picture:
“File:People-World-Map-Prismatic-2.png” by GDJ is marked with CC0 1.0