Cards that come back
Concepts you miss become smartcards, resurfaced right before you would forget them.
BkwrmLearn anything.
Turn any subject into a living map of connected ideas — then prove you can answer, explain, and teach it from memory.
Trusted by students at
How it works
Watch a subject take shape.
Four moves from first note to lasting memory — here on introductory economics.
01Map it
Lay the subject out as connected ideas and label how each one relates. The shape of your understanding becomes something you can see.
02Prove it
Bkwrm asks — you answer from memory. What holds is recorded on the map; what slips is marked, not hidden.
03Teach it
Explain a concept aloud. The worm listens and scores it with specifics, including the one gap worth revisiting.
04Keep it
Only what slipped becomes a card, scheduled to return just before you would forget it.
Introductory economics13 concepts
Generative learning
From memory — why does a price ceiling create a shortage?
It pins price below equilibrium, so quantity demanded rises.
Suppliers pull back — that gap is the shortage.
Mechanism correctAdd: who competes for the scarce units
Teach it aloud
86of 100
Clear chain from scarcity to price. One gap: elasticity.
Smartcards
Question
What makes demand price-elastic?
Answer
Close substitutes, a large budget share, time to adjust.
Returns in 3 daysSources on the canvas
Keep PDFs and lecture videos open beside the map while you build.
Share with one link
Anyone can view your map, and classmates can copy it to build their own.
