List of retired Challenge Patches contains Challenge Patches which can not be seen at Badge page of Khan Academy . To earn them, user had to master some exercises in various subjects.
Older Version
Image
Renewed Version
Chemistry
Chemistry (old)
Chemistry
Computer programming
CS Exercises (old)
CS Exercises
Cryptography & information theory
Journey into Cryptography. (old)
Journey into Cryptography.
Uncategorized
New Topic (old)
New Topic
Math
Addition and subtraction (old)
Addition and subtraction
Algebra: Conic sections (old)
Algebra: Conic sections
Algebra: Imaginary and complex numbers (old)
Algebra: Imaginary and complex numbers
Algebra II: Graphing lines (old)
Algebra II: Graphing lines
Angles (old)
Angles
Angles and intersecting lines (old)
Angles and intersecting lines
Area, perimeter, and volume (old)
Area, perimeter, and volume
Arithmetic properties (old)
Arithmetic properties
Basic ratios and proportions (old)
Basic ratios and proportions
Calculus (old)
Calculus
Circle arcs and sectors (old)
Circle arcs and sectors
Circles (old)
Circles
ck12.org Algebra 1 Examples (old)
ck12.org Algebra 1 Examples
Complex numbers (old)
Complex numbers
Congruent triangles (old)
Congruent triangles
Conic sections (old)
Conic sections
Decimals (old)
Decimals
Equation of a line (old)
Equation of a line
Exponents, radicals, and scientific notation (old)
Exponents, radicals, and scientific notation
Factors and multiples (old)
Factors and multiples
Fractions (old)
Fractions
Functions (old)
Functions
Geometry: Logical reasoning (old)
Geometry: Logical reasoning
Graphing points, equations and inequalities (old)
Graphing points, equations and inequalities
Inferential statistics (old)
Inferential statistics
Interpreting data (old)
Interpreting data
Linear Algebra (old)
Linear Algebra
Linear equations (old)
Linear equations
Linear inequalities (old)
Linear inequalities
Logical reasoning (old)
Logical reasoning
Matrices (old)
Matrices
Multiplication and division (old)
Multiplication and division
Negative numbers (old)
Negative numbers
Negative numbers and absolute value (old)
Negative numbers and absolute value
Number properties (old)
Number properties
Percents (deprecated) (old)
Percents (deprecated)
Perimeter, area and volume (old)
Perimeter, area and volume
Points, lines, and planes (old)
Points, lines, and planes
Polynomials (old)
Polynomials
Polynomials and quadratics (old)
Polynomials and quadratics
Precalculus (old)
Precalculus
Probability and statistics (old)
Probability and statistics
Pythagorean theorem (old)
Pythagorean theorem
Quadratics (old)
Quadratics
Quadrilaterals (old)
Quadrilaterals
Rates and ratios (old)
Rates and ratios
Similarity (old)
Similarity
Special properties and parts of triangles (old)
Special properties and parts of triangles
Systems of equations and inequalities (old)
Systems of equations and inequalities
Telling time (old)
Telling time
Transformations (old)
Transformations
Triangles (old)
Triangles
Trigonometry and precalculus (old)
Trigonometry and precalculus
Vectors (old)
Vectors
116 badges
