Need help figuring out how to work with circles in basic geometry? 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). With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn about how to calculate an...
Need help figuring out the sine, cosine, and tangent of an angle in a right triangle? Need to know how to solve a matrix-form linear equation in algebra? Need help solving problems involving 45°-45°-90° right triangles? You're in luck. 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 stu...
Looking for an easy way to solve rate-of-change problems? Use the chain rule! 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). With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to calcula...
Learn how to graph the amplitude and periods of sine and cosine functions in basic trigonometry. Learn how to use trigonometric functions to calculate the sides of a right triangle. Need to know how to solve a matrix-form linear equation 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 (or just finish your h...
New to trigonometry? Learn how to calculate cosine, sine and tangent with this 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). With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how t...
Want to know how to sum a series of consecutive integer numbers (e.g., 1+2+3+4+5)? You're in luck. 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). With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll...
Need to know how to figure out the least common multiple or LCM of two given 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 (or just finish your homework or study for that next big test). With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to...
Need to know how discover the area of a triangle or rectangle? 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). With this installment from Internet pedagogical superstar Salman Khan's series of free math tutorials, you'll learn how to find the area and peri...
New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 602nd installment in their series of digital spreadsheet magic tricks, you'll learn how to create a compact array formula that can total sales with 1 criteria when the database does not have a price or total sales column. See how SUMIF can be used to lookup values and simulate a missing column from a database.
If your students are having trouble remembering how to calculate density properly, check out this video. In it, you will learn the lyrics to a very fun song that will help your kids with the equations and vocabulary. Follow along with Mr. Edmonds as he shows you his favorite song to the tune of "Popular" from the Broadway show "Wicked".
Looking for a primer on how to create and work with array formulas in Microsoft Office Excel? You've come to the right place. In this free video tutorial from everyone's favorite MS Excel guru, YouTube's ExcelIsFun, the 7th installment in his series of Excel array formula series, you'll learn how to create array formulas for summing and counting when there are multiple conditions. See how to use Boolean logic and array formulas to calculate when there are multiple conditions.
If you use Microsoft Excel on a regular basis, odds are you work with numbers. Put those numbers to work. Statistical analysis allows you to find patterns, trends and probabilities within your data. In this MS Excel tutorial from everyone's favorite Excel guru, YouTube's ExcelsFun, the 41st installment in his "Excel Statistics" series of free video lessons, you'll learn how to calculate deviations, variance and standard deviation for a sample and a population using Excel tables and the VAR, S...
If you use Microsoft Excel on a regular basis, odds are you work with numbers. Put those numbers to work. Statistical analysis allows you to find patterns, trends and probabilities within your data. In this MS Excel tutorial from everyone's favorite Excel guru, YouTube's ExcelsFun, the 10th installment in his "Excel Statistics" series of free video lessons, you'll learn how about data sets and the nominal, ordinal, interval and ration scales/levels of measurement and see two Pivot Tables that...
New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 588th installment in their series of digital spreadsheet magic tricks, you'll learn how to determine whether an employee is exempt from a tax using a VLOOKUP in an IF function, and if not use a second VLOOKUP lookup query to look in tax tables to look up and calculate the tax
New to Microsoft Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this MS Excel tutorial from ExcelIsFun, the 195th installment in their series of digital spreadsheet magic tricks, you'll learn how to use the SUM, MIN and VLOOKUP functions to create a grade book based on given total score that drops the lowest score and calculates grades automatically.
Jennisse uses an item called a Bowdabra which was purchased at Michaels to create beautiful holiday bow. First she uses a wire covered in gold and places it in the center of the Bowdabra. She uses two rolls of ribbon, making sure the wire on the sides is thick. Use a long piece of the ribbon to make longer legs on the bow. Facing down, she places it into the Bowdabra, twist the end, and make sure the ends are the same size. Press down the center of the Bowdabra making it tight, lift the wire,...
In Chemistry weight of some elements are measure in the form of Average Atomic Mass. Isotopes are found in different abundances in nature. Certain elements have many isotopes and certain elements have few isotopes. Regardless of the number of the natural isotopes, the weighted average mass takes into consideration not only the mass of each isotope, but what also its natural abundance in terms of percent as found in the nature. So when you have the mass of two isotopes of an element and are gi...
New to Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this Excel tutorial from ExcelIsFun, the 274th installment in their series of digital spreadsheet magic tricks, you'll learn how to calculate various probabilities for a binomial distribution when there are additional complicating factors. This is accomplished with recourse to Excel's BINOMDIST, NORMSDIST, SUMIF, SUM, INDEX and MATCH functions. See also how to create th...
New to Excel? Looking for a tip? How about a tip so mind-blowingly useful as to qualify as a magic trick? You're in luck. In this Excel tutorial from ExcelIsFun, the 248th installment in their series of digital spreadsheet magic tricks, you'll learn how to use the PERCENTILE and QUARTILE functions to calculate percentiles, quartiles and deciles in basic statistics.
In this video you learn how to make a digital pinhole camera. The video begins with an introduction addressing the main themes to be dealt with in the video - tight budgets, photography and specialized lenses. In this video, Kai modifies a photo lens cap by poking a large hole in it. After making this large hole, he makes a smaller hole in a thinner material and lines the hole up in the center. He calculates the size of the hole he needs based on the wavelength he will be photographing. He us...
Need a new prank or trick to play on your friends? Well this video is your solution. All you need a non-transitive dice and to follow this video and you will be cheating your friend in no time. The idea behind this video is to use dice that are non standard, which means instead of having from 1 to 6 on the sides, they have other numbers. By playing with what numbers go on the faces, the viewers can skew with the probabilities of what number comes up. With this idea, the viewers can make dice ...
Ever wonder how to measure the height of a building, without using a tape measure? Well, this crazy science experiment will show you how. Just watch and you'll see how to measure the height of a building with a CRT monitor, gravity and math.
The multiple award-winning card game Sixteen is packed with head-to-head action. If you can you count to 16 and take calculated risks, then you can force your opponent to bust. But play your cards defensively at the right time or the tables will turn! Win the most sets and you'll win the game. It sounds simple (and it is), but Sixteen's unique strategy and cribbage-like counting will hold the attention of even the most seasoned game players.
The first video introduces the basic electrical quantities of charge, current, voltage, and resistance. The concept of quantities and units is explained. The units of Coulombs, Volts, Amperes, and Ohms are described. The three basic formulas of Ohm's Law (E=IR, I=E/R and R=E/I) are also introduced.
You've probably tried just about every method of hanging your holiday decorations: nails, thumbtacks, sticky hooks, and, in desperation, even tape. Each method can leave a host of complications when removed, though, from chipping paint to visible holes.
If you don't have hangers with clips, hanging up jeans and dress pants can be frustrating. They never stay straight and constantly slide off the hangers. You can always MacGyver your own pants hangers by using clothespins, but if you don't have any, there's another way.
Frustrated with a bedroom closet that doesn’t work for you? You’re not alone, and you don’t have to live with it the way it is! In this episode, a renter’s closet gets a makeover so she can have easy access to everything and have more hanging space. Taking the sliding doors off and getting rid of the shelf above the rod opens up all sorts of possibilities, including adding a double hanging rod. You’ll see how easy it is to organize your bedroom closet to maximize the space, all on a budget.
Your closet is an area that holds important things such as keys, glasses, clothes and shoes. However, for some reason, it's always messy. Why is this? I know my closet is messy because I don’t have a lot of time to sit down and organize every little thing in there. I have never really even given much thought into organizing it.
Increase the storage capabilities of your home! This tutorial shows you how you can create a wall hanging out of fabric that will let you store your coupons, reciepts and other important papers. All you need are some basic sewing tools and a sewing machine.
This tutorial has been specifically designed for those who like to crochet left handed. Create a pot holder and include a ring so that it can be hung from a hook or an oven. Just choose your favorite color of yarn and get started!
This is a great gift for anyone in your life who enjoys cooking. Crochet them a pot holder. This tutorial shows you how to incorporate a ring into the pattern so it can be easily hung from a hook or an oven door.
When you were a kid, did you have dreams of sugar plums dancing in your head while not even a mouse was stiring and all the stockings were hung up with care? Yup, thought so. Celebrate those times when Christmas morning was magical and Santa Claus always knew what you wanted by crafting this sugar plum inspired Christmas ornament.
While it's true that Christmas wreaths are traditionally meant to go on your front door, you needn't think so inside the box when it comes to the donut-shaped Christmas decor.
If you're planning on hosting a holiday party this year, you can't not have mistletoe hanging from a convenient doorway! This tutorial shows you how you can make your own festive sprig mistletoe out of artificial plants and some Christmas ribbon.
This is a super easy project that uses all natural products - starting with a birch log! You will also need a drill to make the holes in the log, as well as some wire to hang it from a tree with.
You can make these stars out of wrapping paper scraps, designer paper or any other festive paper that catches your eye. Turn them into 3-D crafts that you can hang from your tree, attach as extras to gifts or use as decorations.
This is a fun and easy project you can do in an afternoon. Why spend money on expensive ornaments when you can go green to decorate your Christmas tree this year? All you need is some festive paper and thread.
So you have finished your crochet or knitting project, but now there are a few tails of yarn hanging loose. What to do with them? This video shows you how to sew in those tails and keep your project from unraveling.
This is a perfect gift for the Wiccan or pagan on your holiday gift list - make a wall hanging or wreath shaped like a pentacle. A perfect blend of Christmas and Yule! You will need 16 gauge wire, along with your favorite ribbons and beads.
In this clip, we learn how to make a twisted Solomon Bar bracelet with paracord. Once you get the hang of it, you'll find it's quite easy. For more information, including detailed, step-by-step instructions, and to get started making your own paracord bracelets, watch this video tutorial.
