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 13th installment in his series of Excel array formula ser ...more

Learn how to store, use and manipulate equations in MS Excel 2010. Whether you're new to Microsoft's popular spreadsheet application or a seasoned business professional just looking to better acquaint yourself with the unique features of Excel 2010, you're sure to be well serv ...more

Need some help figuring out how to make sense of functional relationships? See how it's done with this free video math lesson. Need help finding the From Ramanujan to calculus co-creator Gottfried Leibniz, many of the world's best and brightest mathematical minds have belonged ...more

A tutorial about the math software GeoGebra on working with polygons.

Need help figuring out how to work with exponents in basic arithmetic? Find out 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 Inte ...more

2 + 2 = 4. That's about as much math as I can handle without a calculator on a daily basis. I literally hate doing math more than anything in life, mostly because I'm not good at it—and I hate doing things I'm not good at. So, when I come across a cool math trick online that ...more

Welcome to Math Craft World! This community is dedicated to the exploration of mathematically inspired art and architecture through projects, community submissions, and inspirational posts related to the topic at hand. Every week, there will be approximately four posts accordi ...more

Adding and subtracting may be the easiest of mathematical operations, but once you get it down, multiplication and division can be just as easy. That's why it's called elementary arithmetic. If it were harder, it would be called college algebra or trigonometry. But it's not— i ...more

It's Monday, which means once again, it's time to highlight some of the recent community submissions posted to the Math Craft corkboard. I also thought that we'd try and create something known as an "Orderly Tangle" or "Polylink". This week we had a few submissions based off ...more

It's once again Monday, which means it's time to highlight some of the most recent community submissions posted to the Math Craft corkboard. I also thought we'd take a look at building a model that has appeared in numerous posts. It's the simplest of the intersecting plane mod ...more

Before the calculator and even the abacus was invented, there was a little instrument called the human brain that we used to do math. Remember that? While most of us turn to our trusty Ti-84s to do calculus homework or whip out our cell phone calculators to determine how much ...more

Use this rigged game to cheat your friends twice in a row! The game functions just like 31, only this time you'll always win if you follow the instructions in this video. From Revision3: This week we're learning a rigged game that combines principles we learned from both the ...more

In this lesson, you will learn how to solve a probability word problem. Need help with your algebra and geometry? Well... P(event)= Number of favorable outcomes / Total number of outcomes In the above problem, the number of favorable outcomes is 4 because there are $ blue ma ...more

It's Monday, which means once again, it's time to highlight some of the most recent community submissions posted to the Math Craft corkboard. I also thought we'd take a look at building a sliceform model of a hyperbolic paraboloid. Rachel Mansur put up two posts on her Modula ...more

Richard Sweeney is an incredible artist whose body of work consists mainly of sculptures made from paper. His art is often related to origami, and much of his work is related to geometrical forms. I personally really love his modular forms in paper. Many of them are based off ...more

Reuben Margolin builds large scale kinetic sculptures based off of mechanical waves. Some of his sculptures contain hundreds of pulleys all working in harmony with each other to create sinusoidal waves and their resulting interference patterns. He designs them all on paper and ...more

In this tutorial, we learn how to cheat on a math test using a calculator. The first way to cheat is to go into your calculator where the programming is. After this, you can type in the information that you need to store into the calculator and then save it to look at later. T ...more

Need help figuring out how to find a given percentage of a whole number (e.g., 16% of 736)? Watch 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, thank ...more

Combination locks are a major part of life for people High School, the Armed Services, and enough other places to make this video very useful to a lot of people. It will show you how to open any twisting combination lock (like a Masterlock) with using math or any other sophist ...more

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 s ...more

Math homework isn't the easiest thing to get through quickly, no matter how prepared you are. Knowing your stuff simply won't cut it. Going through dozens of equations in one sitting could take up hours of your time. Even when you finish, there's always going to be that one pr ...more

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 sup ...more

I wish there was more information about this impressively massive sonobe model, but all I can glean is that it appears to have been made by Imogen Warren, and was posted by Room 3. So awesome.

Flickr user fdecomite showcases his beautiful portfolio of geometry-inspired papercraft. His dedication to the craft is astounding. Get ready to take a journey down the rabbit hole cuz this work gets trippy. Behind the scenes process photos: Previously, Damn, This Dude Knows ...more

In this clip, you'll learn how to create a simple calculator program with Java. Whether you're new to the Java object-oriented programming language or are a seasoned developer merely looking to improve your chops, you're sure to find benefit in this free video programming less ...more

Natural processes often create objects that have a fractal quality. Fractal branching patterns occur in plants, blood vessel networks, rivers, fault lines, and in several electrical phenomena. Many of these processes take lifetimes, or even occur on geological timescales. But ...more

Meet Matt Weathers, Biola University math professor and probable blood relative of Mary Poppins. Because, really, who but a Poppins could pull off a prank of this sort? Think Who Framed Roger Rabbit for the PowerPoint set. Or, better yet, see for yourself in the video gallery ...more

It's Monday, time to highlight some of the community submissions posted to the Math Craft corkboard. One of these posts inspired me so much, I think it merits a closer look. Today, I present a "simple" method for making a golden spiral using just a straight edge, a compass, an ...more

It's once again Monday, which means it's time to highlight some of the most recent community submissions posted to the Math Craft corkboard. Since two of these posts were on polyhedral versions of M.C. Escher's tessellations, I thought we'd take a look at building a simple tes ...more

Erik Demaine is a Professor of Electronic Engineering and Comp Sci at MI, but he is also an origami folder who has had work displayed at the Museum of Modern Art in NYC. He makes some beautiful models and intricate puzzles, but in my opinion the really inspirational work is th ...more

Since today (11/11/11) is the last 6 digit binary date this century, I thought we should look at some kinetic binary calculators. Matthias Wandel built a beautiful 6 digit binary computer out of wood. If you want to build one, he even gives you some more information and instr ...more

Check out this instructional math video that demonstrates how to solve number lines. In the 11th lesson, learn how to solve SAT problems using the Official SAT Study Guide. Here are the math problems and their page numbers that this video covers: - p409 #8 - p535 #17 - p583 # ...more

Vladimir Bulatov makes sculptures of fantastic variations on polyhedra and other geometric objects. His site is full of incredible metal, glass, and wooden geometric sculptures, including a full section on pendants and bracelets. Here are just a dozen or so of the hundreds of ...more

Eric Gjerde is a master of origami who devotes much of his energy on origami tessellations. Some of his pieces fold nearly flat, forming layers that add just a hint of depth. These pieces look beautiful when lit from behind, due to the variations in brightness and color. Other ...more

Sigma Notation. Tetrahedral Numbers. Pyramidal Numbers. You'll learn all about them and some relations between them. Know you're math, or Greek math.

Andrew Lipson builds sculptures based off of Mathematical objects using standard Lego bricks. He has built models of knots, Mobius strips, Klein bottles, Tori, Hoberman spheres (using Lego technic pieces), and recreations of M.C. Escher works. Below are a few images and brief ...more

I'm not a fan of this practice, but many developers release their wares on iOS before eventually porting their apps to Android. This was the case for PhotoMath, a popular and very useful app that can solve math problems with your smartphone's camera. The app is incredibly int ...more

Fractions are numbers of the form a/b, where a and b are integers. Fractions are also called as ratios. Fractions are further divided into proper fractions and improper fractions. Proper fractions are those where the numerator is less than the denominator and improper fraction ...more

It's another Monday, which means it's once again time to highlight some of the recent community submissions posted to the Math Craft corkboard. Additionally, I thought we'd take a look at the process of stellation and make some stellated polyhedra out of paper.Rachel Mansur of ...more

I am an English major physically allergic to all algebraic formulas, so you're unlikely to get any help from me when it comes to solving any expressions. But in the glorious technological age we live in, there are plenty of apps that actually make math and problem solving fun, ...more

Last week Math Craft admin Cory Poole demonstrated how to make three of the platonic solids from Sonobe units: the cube, the octahedron, and the icosohedron; but where was the dodecahedron? I was pushed to find out how to make a sonobe dodecahedron from this beautiful picture ...more

Android Nougat has a new API that lets apps create their own custom Quick Settings tiles. A similar feature was buried in Android Marshmallow, but that required a hacky workaround, and most manufacturers disabled it in their custom versions of Android 6.0. But since this is an ...more

It's Monday, and once again it's time to highlight some of the community submissions posted to the Math Craft corkboard. In addition, I thought we'd take a look at having fun with the geometrical properties of polygons and circles by using one of the best circles I know, the p ...more

It's another Monday, which means once again, it's time to highlight some of the recent community submissions posted to the Math Craft corkboard. Additionally, I thought we'd take a look at the Mobius Strip. Rachel Mansur of Giveaway Tuesdays posted twice to the corkboard. The ...more

Ever watch a cheesy movie and say "That monster is so FAKE!" but not really understand why? Well monstrous monsters are governed by a little biological rule called the Square-Cube Law, a scientific term combining math, anatomy and physics into one educational tool to recognize ...more

This video teaches us the method to simplify the fractions. Let us take an example of 18/24. Find a number that goes into both 18 and 24. Divide the top and bottom by the same number. Here, 2 will go into both numbers. So, the number now becomes (18/2)/(24/2) which gives 9/12. ...more

As sure as death and taxes, sitting at a wobbly table at one time or another is inescapable. With your weight on it, the table shifts from one end to the other, lifting one leg in the air and then the other; a parade of seesaws, especially if you have someone sitting on the ot ...more

There are good magic tricks, and there are bad magic tricks. The host of this video tutorial might not be the most skilled magician around, but he's a pretty good judge of card tricks. Check out how to perform the best math card trick ever! With just a little math and a little ...more

Just by moving one match you can turn the math problem into a correct answer. Definitely use this to get some free drinks. And you already know the answer, so it won't be hard. If you want to try and figure this one out for yourself, pause the video before the reveal. Fun Par ...more

Here at WonderHowTo we're overflowing with top-notch origami tutorials. However, when it comes to the lesser known art of kirigami, we could always use a couple more enthusiasts. Kirigami is a form of origami that (unlike origami) involves making intricate cuts, and the result ...more

It's Monday, which means once again, it's time to highlight some of the recent community submissions posted to the Math Craft corkboard. In this post, we'll also make a flexagon, which is a type of transformable object. Rachel Mansur of Giveaway Tuesdays posted several pictur ...more

We will be translating the sentence "twice y differs from 5 by more than two, “into a mathematical equation. The word twice generally means two times, so 2*y (because y comes next in the sentence). Differs normally means is different and a difference from something in a mathem ...more

In this permutation and combination math tutorial, we will learn how to find the number of possible arrangements in a set of objects. So, if you need help with your algebra or geometry homework, watch this. An arrangement of a set of objects in a certain order is called a PER ...more

Though impressive, reading minds in person has been done and overdone. Revamp this tired sport by learning how to mind read over the phone and even on Twitter. Watch this video for Scam School's method on reading minds over social media mediums. So whether you're at the bar o ...more

In this math lesson we will learn how to solve simple probability problems with a number cube. The probability of an event measures the likelihood that the event will occur. When trying to find the probability of an event, use this formula: P(event) = number of favorable ou ...more

Bucky from The New Boston serves up this Python video tutorial on how to use simple numbers and math calculations in Python. This is the program you use to write all of your Python code down. Fun with numbers! Python is a dynamic, object-oriented, high-level, programming lang ...more

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 ...more

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 352nd installment in their series of digital spreadsheet magic tricks, you'll learn how to convert ...more

Do you want to help your first grade student learn math skills? Get expert tips on teaching first grade math lessons in this free education video series. Part 1 of 12 - How to Teach first grade math lessons. Teach first grade math lessons - Part 2 of 12. Click through to watch ...more

Not all people can catch up with formulas, and problem solving skills, but with the right attitude and proper time management there's no doubt you'll pass the subject. How to pass your math class Be prepared. Physically, mentally and emotionally! Put your mind into it. Tell ...more