40 public decks · 670 cards — free to study with spaced repetition.
French Basics
19 cards · Language · “Bonjour”
Spanish Basics
16 cards · Language · “Hola”
Multiplication Tables
14 cards · Math · “6 × 7”
World Capitals
14 cards · Geography · “Japan”
U.S. Presidents
19 cards · History · “Who was the 1st U.S. president?”
Periodic Table: Element Symbols
14 cards · Science · “Hydrogen”
Basic Algebra
18 cards · Math · “Solve: x + 5 = 12”
Geometry Formulas
20 cards · Math · “Area of a rectangle”
Spanish Verbs (Present Tense)
15 cards · Language · “ser”
Common English Idioms
15 cards · Language · “Break the ice”
Human Anatomy: Bones
19 cards · Science · “The thigh bone (longest bone)”
Calculus: Derivatives
17 cards · Math · “d/dx [xⁿ]”
Japanese Hiragana
18 cards · Language · “あ”
Greek Mythology
15 cards · History · “King of the gods, god of the sky”
SAT Vocabulary
19 cards · Test prep · “Ephemeral”
Physics Formulas & Constants
17 cards · Science · “Newton's second law”
Music Theory Basics
19 cards · Other · “Notes in a chromatic octave”
CS: Data Structures & Big-O
15 cards · Other · “Big-O of array access by index”
German Basics
15 cards · Language · “Hallo”
Ancient Rome & World History
18 cards · History · “Who was the first Roman emperor?”
Italian Basics
19 cards · Language · “Ciao”
Japanese Katakana
16 cards · Language · “ア”
The Greek Alphabet
14 cards · Language · “Α α”
NATO Phonetic Alphabet
19 cards · Other · “A”
Spanish Colors & Numbers
16 cards · Language · “Rojo”
Roman Numerals
16 cards · Math · “I”
Fractions, Decimals & Percentages
14 cards · Math · “1/2 as a decimal”
Squares & Square Roots
18 cards · Math · “6²”
Trigonometry Values
18 cards · Math · “sin 0°”
Metric & Unit Conversions
18 cards · Math · “1 kilometer in meters”
The Solar System
17 cards · Science · “Closest planet to the Sun”
Cell Biology: Organelles
15 cards · Science · “The powerhouse of the cell”
Human Body Systems
14 cards · Science · “System that pumps blood”
Chemistry: Common Compounds
18 cards · Science · “Water”
Biology: Classification
16 cards · Science · “The most specific taxonomic rank”
U.S. States & Capitals
17 cards · Geography · “California”
World War II: Key Facts
17 cards · History · “Years World War II was fought”
Ancient Egypt
18 cards · History · “The river central to ancient Egypt”
Python Basics
17 cards · Other · “Print text to the screen”
Literary Devices
17 cards · Other · “Comparison using "like" or "as"”