I'm a fan of the foldables and I've got one going in my World History classes to review the basics of empires before we get to studying specific empires.
Earlier this week, students completed this "investigation" based on the "What is an empire?" article and they read the Authority and Control in Ancient Empires article yesterday. To review, we did some "magic" paper folding that resulted in a Frayer model cheat sheet.
Step 1: Hold paper landscape style
Step 2: Fold paper across ("hamburger style"0
Step 3: Fold across again ("hamburger style")
Step 4: Find the corner that is most "closed" (think of where the center of the unfolded paper would be) and fold over about an inch or two
Step 5: Unfold and trace the creases with a pen/market EXCEPT for inside the center box
Step 6: Label the sections however you'd like! Here's how we did ours...
BONUS POINTS if you're totally extra with your students about the folding process and the "big" reveal when you unfold 
