The World of Math

The current design of the World of Math.

The World of Math was a Math mission on Khan Academy. This mission had the most exercises (1497) and details on the number of skills can be found here. Due to the June update and transitioning of Khan Academy, missions have been removed forever. They have now been replaced with Course Mastery.

It is divided into even more missions:

K-8th Grade

1. K-2nd
2. 3rd grade (U.S.)
3. 4th grade (U.S.)
4. 5th grade (U.S.)
5. 6th grade (U.S.)
6. 7th grade (U.S.)
7. 8th grade (U.S.)

Fundamentals

1. Early math
2. Arithmetic Math Mission
3. Pre-algebra Math Mission
4. Basic geometry Math Mission

High school and beyond

1. Algebra basics
2. Algebra I
3. Geometry
4. Algebra II
5. Trigonometry
6. Probability and statistics
7. Precalculus
8. Differential calculus
9. Integral calculus
10. Differential equations

Users can view their progress on this mission on their Learning Dashboard.

Mission	Total Skills	Challenge Patches	Mission Skills	Foundation Skills
Early math Math Mission	Early math exercises (93)	Counting (12) Place value and patterns (8) Addition and subtraction (51) Measurement and data (14) Geometry (8)	93 mission skills	No mission foundations
3rd grade (U.S.) Math Mission	3rd grade exercises (62)	Addition and subtraction (3) Multiplication and division (12) Fractions (13) Measurement and geometry (24) Place value and rounding (1) Expressions and patterns (3)	56 mission skills	Mission foundations count (6)
4th grade (U.S.) Math Mission	4th grade exercises (85)	Addition and subtraction (2) Multiplication and division (14) Fractions (23) Measurement and data (9) Geometry (16) Factors, multiples and patterns (6) Place value and rounding (4)	74 mission skills	Mission foundations count (11)
5th grade (U.S.) Math Mission	5th grade exercises (82)	Arithmetic operations (13) Fractions (16) Place value and decimals (14) Measurement and data (11) Geometry (4) Algebraic thinking (4)	62 mission skills	Mission foundations count (20)
6th grade (U.S.) Math Mission	6th grade exercises (126)	Ratios, rates, and percentages (9) Arithmetic operations (16) Negative numbers (20) Properties of numbers (4) Variables and expressions (22) Geometry (15) Data and statistics (22)	108 mission skills	Mission foundations count (18)
7th grade (U.S.) Math Mission	7th grade exercises (105)	Rates, proportional relationships, and ratios (7) Negative numbers: addition and subtraction (16) Negative numbers: multiplication and division (13) Fractions, decimals, and percentages (8) Variables and expressions (10) Geometry (15) Statistics and probability (12)	81 mission skills	Mission foundations count (24)
8th grade (U.S.) Math Mission	8th grade exercises (111)	Numbers and operations (17) Solving equations with one unknown (5) Two-variable linear equations and functions (27) Systems of equations (10) Geometry (23) Data and modeling (7)	88 mission skills	Mission foundations count (23)
Arithmetic Math Mission	Arithmetic exercises (119)	Addition and subtraction (8) Multiplication and division (16) Negative numbers and absolute value (12) Decimals (37) Fractions (47) Telling time (2)	119 mission skills	No mission foundations
Pre-algebra Math Mission	Pre-algebra exercises (158)	Negative numbers and absolute value (12) Factors and multiples (11) Decimals (37) Fractions (45) Ratios, proportions, units, and rates (5) Applying mathematical reasoning (17) Exponents, radicals, and scientific notation (17) Arithmetic properties (10) Measurement (7)	158 mission skills	No mission foundations
Algebra basics Math Mission	Algebra basics exercises (89)	Foundations (31) Algebraic expressions (8) Linear equations and inequalities (16) Graphing lines and slope (13) Systems of equations (3) Expressions and equations with exponents (2) Quadratics and polynomials (10) Equations and geometry (6)	89 mission skills	No mission foundations
Algebra I Math Mission	Algebra I exercises (158)	Introduction to algebra (15) Linear equations (19) Linear inequalities (7) Two-variable linear equations and introduction to functions (25) Systems of equations and inequalities (17) Multiplying and factoring expressions (12) Quadratic equations (15) Exponent expressions and equations (14) Functions (19) Ratios and proportions (7)	144 mission skills	Mission foundations count (14)
Geometry Math Mission	Geometry exercises (110)	Angles and intersecting lines (14) Congruence (7) Similarity (7) Right triangles and trigonometry (10) Perimeter, area, and volume (18) Circles (7) Special properties and part of triangles (1) Quadrilaterals (2) Transformations (15) Analytic geometry (7) Geometric constructions (4)	92 mission skills (MF repeated in analyt. geo.)	Mission foundations count (19)
Algebra II Math Mission	Algebra II exercises (140)	Systems of equations and inequalities (13) Functions and their graphs (24) Polynomial and rational functions (26) Rational expressions (23) Exponential and logarithmic functions (8) Logarithms (4) Imaginary and complex numbers (7) Conic sections (12) Matrices (7)	123 mission skills	Mission foundations count (17)
Trigonometry Math Mission	Trigonometry exercises (43)	Basic trigonometry (7) Unit circle definition of trig functions (9) Graphs of trig functions (7) Trig identities and examples (10)	33 mission skills	Mission foundations count (10)
Probability and statistics Math Mission	Probability and statistics exercises (58)	Independent and dependent events (10) Probability and combinatorics (6) Statistical studies (7) Descriptive statistics (10) Random variables and probability distributions (5) Regression (5) Inferential statistics (4)	46 mission skills	Mission foundations count (12)
Precalculus Math Mission	Precalculus exercises (74)	Vectors (8) Matrices (17) Parametric equations and polar coordinates (0) Imaginary and complex numbers (14) Probability and combinatorics (8) Sequences, series and induction (11) Hyperbolic functions (1) Limits (5)	64 mission skills	Mission foundations count (10)
Differential calculus Math Mission	Differential calculus exercises (48)	Limits (9) Taking derivatives (19) Derivative applications (14)	42 mission skills	Mission foundations count (6)
Integral calculus Math Mission	Integral calculus exercises (56)	Integrals (15) Integration techniques (6) Integration applications (8) Sequences, series, and function approximation (19) AP Calculus practice questions (0)	48 mission skills	Mission foundations count (8)

A list of previous math exercises that have been removed

This list contains exercises that have been removed for reasons such as removal, splitting previous exercises, or possibly for fixing bugs. As they are re-implemented, they will be removed from this list.

1. 2D geometric models
2. Absolute value word problems
3. Analyzing data with dot plots
4. Area 1
5. Arithmetic Sequences
6. Building fractions from unit fractions
7. Comparing the center and spread of data distributions
8. Comparing two-digit numbers-old
9. Constructing and interpreting absolute value
10. Constructing consistent and inconsistent systems
11. Converting between point-slope and slope-intercept form
12. Counting 2
13. Defining sequences as functions
14. Describing distributions with center and spread
15. Divisibility 0.5
16. Drawing lines
17. Equations from tables
18. Evaluating exponent expressions word problems
19. Evaluating expressions with exponents
20. Expressions with parentheses
21. Finding probability
22. Fraction word problems 1
23. Fractions greater than one
24. Geometric descriptions of real-world objects
25. Graphically understanding solution methods to systems of equations
26. Graphing linear equations
27. Inequalities in one variable 1
28. Integers on the number line
29. Interpreting and finding intercepts of linear functions
30. Interpreting linear relationships
31. Modeling with one-variable equations and inequalities
32. Modeling with two-variable equations and graphs
33. Multiplying area with unit squares
34. Negative number word problems
35. Number line 1
36. Operations with rational numbers
37. Orders of magnitude
38. Patterns in zeros
39. Performing transformations on the coordinate plane
40. Positive and negative fractions on the number line
41. Probability space
42. Properties of multiplication 1
43. Properties of multiplication 2
44. Properties of rigid transformations
45. Quantitatively defining rigid transformations
46. Reading and setting clocks
47. Recognizing triangles
48. Slope and triangle similarity
49. Solving for the y-intercept
50. Sorting absolute value word problems
51. Teen numbers 2
52. Teen numbers 3
53. Testing solutions of equations and inequalities
54. Testing solutions of equations and inequalities word problems
55. Transforming polygons
56. Triangle types
57. Understanding 2-digit numbers
58. Understanding multiplying fractions and whole numbers
59. Understanding probability
60. Understanding systems of equations word problems
61. Understanding the mean
62. Units and scale of graphs
63. Variation in samples
64. Writing expressions with exponents
65. Writing expressions with exponents word problems
66. Writing numbers to 1000
67. Add within 100: Level 1
68. Add within 100: Level 2
69. Subtract tens
70. Subtract within 100: Level 1
71. Addition and subtraction word problems 1
72. Addition and subtraction word problems 2
73. Comparing decimals 2
74. Evaluating arithmetic sequences 2
75. Dilations