Inspired by the popular puzzle: find groups of four items that share a hidden connection. Pick a course, then a unit, then sort 16 clues into four hidden categories, in Easy or Hard mode.
You'll see 16 terms, people, cases, models, or concepts in a grid. They secretly belong to four groups of four. Select four tiles you think belong together, then hit Submit.
Next you'll choose from six AP courses: US History, World History, Human Geography, Government, Macroeconomics, and Microeconomics. Each course is broken into its real units, so you can review one unit at a time or work through the whole course.
Every unit has two versions. Easy groups are more direct, think "these are all court cases" or "these are all market structures." Hard groups cut across categories on purpose: a shared year, a mirrored pair like push factors vs. pull factors or expansionary vs. contractionary policy, or vocabulary that sounds interchangeable but isn't. Reading closely matters more than recognizing the topic.
Once you solve a group, it's revealed in one of four colors, from most straightforward to trickiest:
You get 4 mistakes before the puzzle ends. If three of your four tiles belong together, you'll see a "One away..." hint.
Shuffle rearranges the remaining tiles. Deselect All clears your current picks.
Each course is broken into its own units. Pick one to see what's inside.
Find four groups of four. Select tiles, then hit Submit.