3rd grade (U.S.) Math Mission

The Math Mission - 3rd Grade is a set of skills on Khan Academy. This mission consists of practicing operations on integers, introducing fractions, extending measurement and geometric knowledge, and beginning treatment of arithmetic properties.

Mission Foundations

 * 1) Filling rectangles with same-sized squares
 * 2) Equal parts of circles and rectangles
 * 3) Measuring lengths with different units
 * 4) Addition within 20
 * 5) Subtraction within 20
 * 6) Comparing numbers within 1000

Addition and subtraction

 * 1) Addition using groups of 10 and 100
 * 2) Addition within 1000
 * 3) Subtraction within 1000

Multiplication and division

 * 1) Meaning of multiplication
 * 2) Multiplying 1-digit numbers
 * 3) Meaning of division
 * 4) Basic division
 * 5) 1-digit division
 * 6) Relate division to multiplication
 * 7) Solving basic multiplication and division equations
 * 8) Relate division to multiplication word problems
 * 9) Whole numbers on the number line
 * 10) Two-step word problems with addition, subtraction, multiplication, and division
 * 11) Multiply by tens
 * 12) Multiply by tens word problems

Fractions

 * 1) Recognizing fractions 1
 * 2) Recognizing fractions 2
 * 3) Recognizing fractions???
 * 4) Fractions on the number line 1
 * 5) Fractions on the number line 2
 * 6) Finding 1 on the number line
 * 7) Equivalent fractions on the number line
 * 8) Identifying numerators and denominators
 * 9) Comparing fractions with the same denominator
 * 10) Comparing fractions with the same numerator
 * 11) Naming the whole

Measurement and geometry

 * 1) Understanding area
 * 2) Measuring area with unit squares
 * 3) Finding area by multiplying
 * 4) Comparing areas by multiplying
 * 5) Area and the distributive property
 * 6) Decompose shapes to find area
 * 7) Perimeter 1
 * 8) Perimeter 2
 * 9) Finding perimeter
 * 10) Comparing area and perimeter
 * 11) Telling time word problems with the number line
 * 12) Telling time word problems
 * 13) Solving problems with picture graphs 2
 * 14) Solving problems with bar graphs 3
 * 15) Creating picture and bar graphs 2
 * 16) Marking data on line plots
 * 17) Arithmetic word problems with mass
 * 18) Arithmetic word problems with volume
 * 19) Categorize quadrilaterals
 * 20) Cutting shapes into equal parts

Place value and rounding

 * 1) Rounding to the nearest ten or hundred

Expressions and patterns

 * 1) Properties of multiplication
 * 2) Math patterns 1
 * 3) Patterns in multiplication tables

You can see a list of the other Math missions here.