Math Videos from Across The Web

AdaptedMind pairs practice with quality instruction. We integrate 30 hours of the best math instruction available on the web so you can learn as well as practice!

Most of the videos on AdaptedMind are from Khan Academy, and they are freely available here (via YouTube), directly through YouTube and their site, an excellent resource. We've made our own videos to supplement these, and they are also freely available here and through YouTube.

You can watch a video below, or choose "Practice" to get help while you're practicing math and earning fun badges!

NOTE: All Khan Academy content is available for free at www.khanacademy.org

Counting to Ten	Counting to Ten	Counting to Twenty	Counting to Twenty
Counting Backwards	Counting Backwards	Number Words	Numbers to 100
Numbers up to 100	Counting by 2's, 5's, 10's	Counting By Two and Five and Ten

Basic Number Comparison	Comparing Whole Numbers 2	Tens and Ones Places	Tens and Ones Places
Greater than Less than	Ordering Numbers	Comparison and Ordering, to 200	Rounding to the Nearest Ten
Rounding to the Nearest Ten	Even and Odd Numbers	Even and Odd Numbers	Place Value Through Hundreds
Comparing Whole Numbers	Comparing Numbers up to 1,000	Counting by 2's, 5's, 10's	Counting By Two and Five and Ten
Patterns and Counting by 2's, 5's, 10's	Review Place Value Below One Thousand	Place Value Below Ten Thousand	More on number patterns with place value.
Place value, ordering numbers, number patterns	Even more on place value	More on Place Value	Place value of 4-digit numbers 3
Place value of 4-digit numbers 2	Place value of 4-digit numbers	Place Value 1	Comparing Numbers Below Ten Thousand
More number patterns with place value	Ordering numbers using place value	Rounding	Rounding Whole Numbers 3
Rounding and Estimation	Place Value 100000	Place Value 3	Place Value Hundred Million
Place Value 2	Comparing Whole Numbers	Rounding Whole Numbers	Rounding Whole Numbers 2
Rounding Whole Numbers 1	Addition - Commutative, Associative, Zero	Commutative Law of Addition	Associative Law of Addition
Estimation for Addition	Rounding to Estimate Sums 2	Rounding to Estimate Sums	Estimation for Subtraction
Rounding to Estimate Differences	Comparing Negative Numbers	Probability Edited	Place Value Billions 2
Place Value Through Billions	Place Value Thousandths	Decimal Place Value	Rounding Whole Numbers

Adding ones and tens	Introduction to addition	Adding Below Six	Adding Below Ten
Adding with Zero	Addition by Counting	Doubling	Doubles Below Twenty
Basic Associative Property	Associative Law of Addition	Adding Below Twenty	The sum of and difference between 2 numbers
Adding 2-digit numbers	Adding Three Numbers	Addition Below Fifty With Carrying	Practice carrying digits to add multiple digit numbers
Introduction to carrying	Addition Below One Hundred	Adding Whole Numbers and Applications 1	Missing Addends
Rewriting Addition as Plus Ten	Rewriting Addition as Plus Ten	Adding Three Numbers	Adding Whole Numbers and Applications 3
Two Digit Addition	Two Digit Addition With Carrying	Adding Tens	Adding Tens
Rounding and Addition	Rounding and Addition	Adding 3 2-Digit Numbers	Adding Hundreds
More practice carrying with multiple digit numbers	Adding Hundreds With Carrying	Adding Whole Numbers and Applications 2	Addition Review
Even more adding of 4-digit numbers	More adding of 4 digit numbers	Adding 4 digit numbers	Addition and Inequalities
Properties of Addition	Commutative Law of Addition	Properties of Whole Numbers	Addition up to 10,000
Adding Money

Subtracting Below Five	Introduction to subtraction	Subtracting Below 10	Subtraction As Inverse of Addition
Different ways to view subtraction	The sum of and difference between 2 numbers	Subtracting Zero or All	Subtracting By Counting
Vertical Addition and Subtraction	Addition and Subtraction Below Fifty	Subtraction Below Twenty	Subtraction Below Fifty With Regrouping
Introduction to borrowing and regrouping	Subtraction Below One Hundred	Relating Addition to Subtraction	Place Value and Regrouping
Why borrowing works	Subtracting Hundreds	More subtraction word problems	Subtraction word problem with balloons
Subtraction word problem with cookies	Subtracting Hundreds with Regrouping	Subtracting with Regrouping and Zeros	Subtraction Review and Vertical Form
Two-Digit Subtraction	Two-Digit Subtraction with Regrouping	Rounding and Subtracting	Checking Subtraction with Addition
Subtracting Tens	Two-Digit Addition and Subtraction Review	Some two-step word problems	Subtraction Review
Alternate mental subtraction method	Subtraction Up To Ten Thousand	Some final 4 digit subtraction problems	Subtraction of multi-digit numbers involving borrowing
Subtracting 4-digit numbers	Subtracting Money	Subtracting Whole Numbers	Subtracting Across Zeroes

Telling Time 1 - Hours	Telling time I - hours	Telling Time II - Half Hour	Telling time II - half hours
Elapsed time I - hours	Elapsed time I - hours	Days of the Week new	Reading a Calendar
Reading a calendar II	Using a schedule	Elapsed Time II - Hours & Half Hours	Months
Comparing Units of Time	Using a Schedule II	Elapsed Time III - Quarter Hours	Converting minutes and hours II
Elapsed time IV - 5 minute intervals	Elapsed time V - minute intervals	Converting Minutes and Hours	Elapsed Time 5 Minute Intervals
Elapsed Time 1 Minute Intervals

Introduction to Weight	Customary Weight	Customary weight	Customary Weight Choose the Best Estimate
Metric Weight	Metric Weight Choose the Best Estimate	Customary Distance Choose the Best Unit of Measure	Customary Distance Choose the Best Estimate
Metric Distance Choose the Best Estimate	Metric Distance Choose the Best Unit of Measure	Customary capacity - choose the best estimate	Metric Capacity Choose the Best Estimate
Temperature	Customary Weight	Customary Weight Choose the Best Estimate	Metric Weight
Metric Weight Choose the Best Estimate	Customary Distance Choose the Best Unit of Measure	Customary Distance Choose the Best Estimate	Metric Distance Choose the Best Estimate
Metric Distance Choose the Best Unit of Measure	Customary Capacity Choose the Best Estimate	Metric Capacity Choose the Best Estimate	Temperature

Identify Solid Figures	Identify Shapes	Counting Sides and Vertices of Plane Shapes	Counting Vertices, Edges, and Faces
Comparing Vertices, Edges, and Faces	Plane Shapes and Solid Figures	Polygons	Polygons (Part 2)
Polygons (Part 1)	Perimeter of Squares	Perimeter of Shapes	Area of Squares
Area of Shapes	Triangles	Quadrilaterals	Solid Figures
Faces, Edges, and Vertices	Solid Figures	Polygon Review	Lines, Line Segments, Rays
Parallel, Perpendicular, Intersecting Lines	Angles	Angles	Triangle Review
Quadrilaterals Review	Parts of a Circle	Congruence	Angles Review
Estimating Angles	Parallel, Perpendicular, Intersecting Lines	Triangle Review	Triangle Angles
Quadrilateral Angles	Area of Triangles	Area of Triangles	Area of Parallelograms and Trapezoids
Volume of Cubes and Rectangular Prisms	Surface Area of Cubes and Rectangular Prisms	Circumference of a Circle	Radius and Diameter and Circumference
Area of a Circle	Area of a Circle

Intro to Coins	Intro to Coins	Counting by Nickels and Dimes	Quarters and Equal Amounts
Counting by Nickels and Dimes	Counting Coins Including Quarters	Comparing Coins	Half-Dollars and Dollars
Change

Learn to Multiply	Multiplying Whole Numbers and Applications 1	Introduction to multiplication	Counting to Multiply
Multiplying by 2, 5 or 10	The Multiplication Tables	Multiplication Word Problems	Multiplying by 2,4,5,10
Multiplying by Zero and One	Multiplying by 3 and 9	Multiplying by 6,7,8	Multiplication Practice
Properties of Multiplication	Associative Law of Multiplication	Commutative Law of Multiplication	Identity Property of 1
Using Multiplication to Divide	Introduction to division	Multiplication of 2-digit numbers by 1-digit numbers	Multiplying a 2-digit times a 1-digit number
Multiplication of 3-digit numbers by 1-digit numbers	multiplying multiple-digit numbers with each other	Multiplication Practice	Multiplication and Division Facts
Multiplication Properties and Division Rules	Multiplying by 2-Digit Numbers	More mult-digit multiplication examples	Multiplying a 2-digit number times a 2-digit number
Estimation using Multiplication

Basic Division	Dividing Whole Numbers and Applications 1	Introduction to division	Counting Backwards to Divide
Remainders	Division Definitions	Dividing by 2, 5, and 10	Dividing by 3, 4, and 9
Dividing By Six, Seven and Eight	Dividing with One and Zero	Division	Dividing 2-Digit Numbers
Introduction to long division and remainders	Dividing Three-Digit Numbers	Dividing Whole Numbers and Applications 2	Division with Remainders
More long division and remainder examples	Division with Quotients with Zero	Placing the First Digit in Division	Dividing Whole Numbers and Applications 3

Introduction to Fractions	Identifying Fraction Parts	Numerator and Denominator of a Fraction	Fractions and Word Problems

Equivalent Fractions	Equivalent fractions	Comparing Fractions	Comparing Fractions 2
Comparing Fractions	Adding Fractions	Adding Fractions with Like Denominators	Subtracting Fractions
Subtracting Fractions	Tenths and Hundredths	Decimal Place Value 2	Tenths, Hundredths, and Money

Fractional Parts of a Number	Fractional parts of a number (Part 2)	Fractional parts of a number (Part 1)	Equivalent Fractions
Equivalent fractions	Simplest Form	Fractions in lowest terms	Comparing Fractions
Comparing Fractions 2	Comparing Fractions	Mixed Numbers	Mixed numbers and improper fractions
Adding and Subtracting Fractions	Subtracting Fractions	Adding Fractions with Like Denominators	Fractions and Decimals
Decimals and Fractions	Converting fractions to decimals	Mixed Numbers & Decimals	Comparing Decimals
Comparing Decimals	Comparing Decimals to Fractions	Representing a number as a decimal, percent, and fraction 2	Representing a number as a decimal, percent, and fraction
Rounding Decimals	Rounding Decimals	Add and Subtract Decimals	Subtracting decimals
Adding Decimals	Improper Fractions and Mixed Numbers	Changing an Improper Fraction to a Mixed Number	Changing a Mixed Number to an Improper Fraction
Proper and Improper Fractions	Equivalent Fractions	Equivalent Fractions	Simplest Form
Simplest Form	Comparing Fractions	Equivalent Fractions and Decimals 1	Comparing fractions decimals and mixed numbers
Ordering numbers expressed as decimals, fractions, and percentages	Equivalent Fractions Edited	Ordering Fractions	Ordering Mixed Numbers
Equivalent Fractions and Decimals	Adding and Subtracting Fractions Review	Adding Fractions with Unlike Denominators	Adding Mixed Numbers Review
Adding Mixed Numbers Word Problem	Adding Mixed Numbers with Unlike Denominators	Adding Mixed Numbers	Subtracting Mixed Numbers Review
Subtracting Mixed Numbers 2	Subtracting Mixed Numbers Word Problem	Subtracting Mixed Numbers	Multiplying Fractions and Mixed Numbers Review
Multiplying Mixed Numbers	Multiplying Fractions and Mixed Numbers	Multiplying Fractions	Dividing Fractions and Mixed Numbers Review
Dividing Mixed Numbers and Fractions	Dividing Fractions	Adding and Subtracting Decimals Review	Multiplying Decimals Review
Dividing Decimals	Dividing Decimals 2.1	Dividing Decimals 2	Mulitplyling Decimals 3
Multiplying Decimals	Multiplying Decimals 2

Expressions with Parentheses	Introduction to Order of Operations	Adding Equals to Both Sides	Evaluating Expressions
More Complicated Order of Operations Example	Order of Operations 2	Order of Operations	Using Variables to Evaluate Expressions
Order of Operations	Expressions with Word Problems	Equations with Variables	Distributive Property
The Distributive Property 2	The Distributive Property	Commutative Property	Commutative Law of Multiplication
Commutative Law of Addition	Associative Property	Associative Law of Multiplication	Associative Law of Addition
Multiplying by One and Zero	Identity Property of 1	Rounding Decimals	Rounding Decimals
Estimating the Addition and Subtraction of Decimals	Estimation with Decimals	Order of Operations	Properties Review
Algebraic Expressions	Equations with the variable on both sides	slightly more complicated equations	Introduction to basic algebraic equations
Simplifying Algebraic Expressions	Algebraic Formulas	Solving Addition and Subtraction Equations	Solving Multiplication and Division Equations
Ratios	Ratios as Fractions in Simplest Form	Cross Products	Find an Unknown in a Proportion 2
Find an Unknown in a Proportion

Factoring	Finding Factors of a Number	Multiples	Least Common Multiple
Factoring Review	Factors vs Multiples	Factors and Multiples	Exponents
Basic Exponents	Level 1 Exponents	Understanding Exponents 2	Understanding Exponents
Prime Factorization and Exponents	Prime Factorization	Prime Factorization	Prime and Composite Numbers
Prime and Composite	Prime and composite numbers	Greatest Common Factor	Greatest Common Factor
Greatest Common Factors	Prime and Composite Review	Prime Factorization and Exponents Review	GCF Review
GCF of 3 or More Numbers	LCM	Least Common Multiple of Three Numbers

Adding and Subtracting Fractions	Subtracting Fractions	Adding Fractions with Like Denominators	Adding and Subtracting Unlike Fractions
Adding Fractions with Unlike Denominators	Adding Fractions greater than 1	Adding Mixed Numbers	Adding Fractions and Mixed Numbers
Adding Mixed Numbers	Adding Mixed Numbers Word Problem	Adding Mixed Numbers with Unlike Denominators	Adding Mixed Numbers
Subtracting Mixed Numbers	Subtracting Mixed Numbers with Like Denominators	Subtracting Mixed Numbers Word Problem	Subtracting Mixed Numbers
Subtracting Mixed Numbers	Subtracting Mixed Numbers 2

multiplying fractions	Multiplying Fractions	Multiplying with Mixed Numbers	Multiplying Fractions and Mixed Numbers
Multiplying Two Mixed Numbers	Multiplying Mixed Numbers	Dividing Integers by Fractions	Dividing Fractions Word Problem
Dividing Fractions by Whole Numbers	Dividing Fractions by Fractions	Dividing Fractions	Dividing Fractions and Mixed Numbers
Dividing Mixed Numbers and Fractions

Adding and Subtracting Decimals	Subtracting Decimals Word Problem	Subtracting decimals	Adding Decimals
Multiplying Decimals by Integers	Multiplying Decimals 2	Multiplying Decimals by Decimals	Mulitplyling Decimals 3
Mulitplication 8: Multiplying decimals (Old video)	Multiplying Decimals	Whole Numbers Dividing into Decimals	Dividing Decimals by Whole Numbers
Dividing Decimals 2.1	Dividing Decimals 2	Dividing Whole Numbers by Decimals	Divding Decimals by Decimals
Dividing Decimals	Dividing with Powers of Ten

Comparing Rational Numbers	Integers	Absolute Value and Adding Integers	Adding/Subtracting negative numbers
Subtracting Integers	Multiplying Integers	Multiplying and dividing negative numbers	Dividing Integers

Percents	Describing the Meaning of Percent 2	Describing the Meaning of Percent	Representing a number as a decimal, percent, and fraction 2
Representing a number as a decimal, percent, and fraction	Percents and Decimals	Percent and decimals	Percents and Word Problems
Solving Percent Problems 3	Solving Percent Problems 2	Solving Percent Problems

Unit Conversion with Metric Units	Converting within the metric system	Conversion between metric units	Unit Conversion with English Units
Unit Conversion Between Metric and English Units	U.S. Customary and Metric units

Mean, Median, Mode

Probability

Squares	Powers of Ten	Unit Conversion	Metric Unit Conversion
Converting within the metric system	Conversion between metric units	Dividing by 2-Digit Numbers	Dividing Whole Numbers and Applications 6
Dividing Whole Numbers and Applications 5	Dividing Whole Numbers and Applications 4	Dividing a two digit number into a larger number	Mean, Median, Mode