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How To: Calculate the width of a fence given its length and perimeter

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to find the width of a fence when given numbers for its length and perimeter.

How To: Solve word problems involving units of volume in basic math

Need some help figuring out how to tackle application problems involving volume? From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to solve application problems involving units of volume.

How To: Play "Waiting for the World to Change" by John Mayer on the ukulele

Want to play "Waiting for the World to Change" by John Mayer on the ukulele? Learn how with this free video ukulele lesson. Whether you play the ukulele or bass kazoo, there is no better way to improve your chops than by learning to play your favorite songs. Not only is it more fun and much easier than running drills or memorizing a chord book by wrote, it's obviously also a wonderful way to build your repertory of songs. For more information, and to get started playing "Waiting for the World...

How To: Multiply Numbers by 9 Using Nothing but Your Fingers

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this free math tutorial, you'll learn how to calculate the area of a triangle by formula. In this clip, you'll learn an easy finger-counting trick for quickly calculating multiples of 9.

How To: Calculate the area of a triangle by formula

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this free math tutorial, you'll learn how to calculate the area of a triangle by formula.

How To: Find the square root of a number in basic arithmetic

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to answer problems that require you to find the square root of a number.

How To: Solve an absolute value equation and graph the answer on a number line

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to solve an absolute value problem in algebra and graph your answer on a number line.

How To: Express a ratio as a fraction in simplest form

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to rewrite a ratio as a fraction in its simplest form.

How To: Simplify rates and ratios with simple arithmetic

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to simplify a rate or ration using simple math.

How To: Calculate unit rates with basic arithmeitc

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to unpack and solve word problems that require you to find a unit rate.

How To: Subtract decimal numbers in basic mathematics

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to subtract one decimal number from another.

How To: Solve word problems that require you to subtract decimal numbers

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to unpack and solve word problems that require you to subtract one decimal from another.

How To: Write a decimal number as a simplified fraction

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to write a decimal number as a simplified fraction in basic mathematics.

How To: Compare two decimal numbers in basic arithmetic

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to solve inequalities involving decimal numbers.

How To: Round a decimal number to the nearest tenth in basic arithmetic

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to round a decimal number to the nearest tenth.

How To: Graph linear inequalities in two variables in algebra

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to graph a linear equation in two variables in intermediate algebra.

How To: Solve a word problem that requires you to add two or more mixed numbers

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to unpack and solve word problems that require you to sum mixed numbers.

How To: Solve word problems that require dividing fractions

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to unpack and solve word problems that require you to divide two or more fractions.

How To: Multiply two or more fractions and simplify your answer

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to multiply and simplify two or more fractions in prealgebra.

How To: Multiply two or more mixed numbers in prealgebra

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to multiply mixed numbers in basic mathematics.

How To: Solve word problems that require multiplying fractions

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to unpack and solve word problems that require you to multiply multiple fractions with like or unlike denominators.

How To: Identify numerators and denominators in basic mathematics

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to identify and name the numerator and denominator of a fraction in prealgebra.

How To: Write remaining parts as a fraction in basic mathematics

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to express remaining parts as a basic fraction in simple math.

How To: Convert an improper fraction to a mixed number in basic math

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to convert improper fractions to mixed numbers.

How To: Find the factors of a number in basic mathematics

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to calculate the constituent factors of a number.

How To: Find the prime factorization of a number in basic mathematics

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to find the find factors of a number

How To: Determine whether two fractions are equivalent in basic mathematics

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to tell whether two fractions are equivalent to one another.

How To: Express a fraction in lowest terms in basic math

From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps. With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to write a fraction in its lowest terms.

How To: Do a variation of a yoga supine spinal twist

In this video, we learn how to do a variation of a yoga supine spinal twist with Dina Prioste. Start by laying down and your knees bent up with your feet as wide as the mat. Let your knees drop over to the right side and cross the bottom foot on the top of the top knee and bring your left arm out. Now, look over the left shoulder and deep breathe. Do this for several seconds and then continue to do on the other side of the body. Remember to focus on your breathing and relax while you're doing...

How To: Use World of Warcraft model viewer with After Effects

World of Warcraft, or Wow as it is affectionately known, is the most popular MMORPG of all time. In the wake of all of this popularity, WoW characters have become a popular subject for machinima, movies made within video games. This video will teach you, the budding machinima filmmaker, to use a piece of software called WoW Modelviewer with Adobe After Effects to incorporate your favorite WoW characters into a video.

How To: Multiply radicals in algebra

Looking for a primer on how to multiply two or more radicals? See how it's done with this free video algebra lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps (or just finish your homework or study for that next big test).

How To: Complete quadratic equations by factoring

Scouring the web for instructions on how to factor quadratic equations in algebra? Look no further. This free video algebra lesson will teach you how. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps (or just finish your homework or study for that next big test).

How To: Solve a linear equation for x in algebra

Need a little help figuring out how to solve a linear equation in algebra? Learn how with this free video lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps (or just finish your homework or study for that next big test).

How To: Calculate the GCF & LCM of a given number set

Need help figuring out how to find the greatest common factor and/or the least common multiple of two given numbers? Learn how with this free video lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps (or just finish your homework or study for that next big test).

How To: Solve a set of two linear equations by graphing

Need to know how to solve a set of linear equations by graphing? Learn how with this free video lesson. From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged to autodidacts. And, thanks to the Internet, it's easier than ever to follow in their footsteps (or just finish your homework or study for that next big test).

How To: Get shiny, healthy, straight hair

Forever Yours demonstrates how to get shiny, healthy straight hair that will last throughout the day using a hairdryer, round brush and a ceramic technology flat iron. Apply a heat protectant before beginning the process to protect the hair. Divide all hair into three equal layers, bottom, middle and top. Clip middle and top sections up high on head and begin by drying the bottom section. Dry the hair fully, divide hair into two sections and starting from one side, flat iron from root to end ...

How To: Tie pointe shoes for ballet

This video gives a demonstration of how to tie pointe shoes for ballet. The shoes are already on the dancers foot. First, take the wide ribbons and cross them over the top of the foot smoothly. Bring them up behind the ankle, right at the ankle bones. Cross them again at the ankles and then cross them again in the front, keeping the ribbons smooth. Bring the ribbons to the inside side of the foot and tie them. You can tie them in a bow or a knot. In the demonstration the ribbons are tied with...