## Q1Overview

The overview video to Part I of the online video course on Quadratics at www.gdaymath.com....

From DrJamesTanton

The overview video to Part I of the online video course on Quadratics at www.gdaymath.com....

From DrJamesTanton

This is the overview video to Part 2 of an online quadratics course. See www.gdaymath.com....

From DrJamesTanton

Video to accompany the text of Part 1, Lesson 1 to my online quadratics course at www.gdaymath.com....

From DrJamesTanton

Video to go with the text of Quadratics Part 1, Lesson 2, which appears at www.gdaymath.com....

From DrJamesTanton

The video to accompany the text of the online course QUADRATICS, part 1, Lesson 3, which appears at www.gdaymath.com....

From DrJamesTanton

The video to accompany the online QUADRATICS course text in Part 1, Lesson 4. See www.gdaymath.com....

From DrJamesTanton

The video to go with the text of the fifth lesson, part 1, of the online QUADRATICS course at www.gdaymath.com....

From DrJamesTanton

This is the video to accompany the text of Part 2, Lesson 1 of the online QUADRATICS course that appears at www.gdaymath.com....

From DrJamesTanton

This is the video to accompany the text of Part 2, Lesson 2 of the online QUADRATICS course available at www.gdaymath.com....

From DrJamesTanton

This the video to accompany the text of Part 2. Lesson 4 of an online QUADRATICS course available at www.gdaymath.com....

From DrJamesTanton

The overview video to go with Part 3 of an online QUADRATICS course: www.gdaymath.com....

From DrJamesTanton

The video to accompany the text the Lesson 1 of part 3 of an online quadratics course: www.gdaymath.com....

From DrJamesTanton

The first part of the video to go with Part 2, Lesson 3 of the online QUADRATICS course at www.gdaymath.com....

From DrJamesTanton

This is the overview video for part 6 of an online QUADRATICS course. It appears as www.gdaymath.com....

From DrJamesTanton

The video to go with the text of lesson 4, part 4 of the online QUADRATICS course appearing at www.gdaymath.com....

From DrJamesTanton

An overview video of part 4 of a QUADRATICS course: www.gdaymath.com....

From DrJamesTanton

The video previewing the text of part 4, lesson 1of an online QUADRATICS course: www.gdaymath.com....

From DrJamesTanton

The video to accompany Lesson 2 of Part 4 to an online QUADRATICS course: www.gdayamath.com....

From DrJamesTanton

A video outlining the four sections of part 7 of a QUADRATICS online course: www.gdaymath.com....

From DrJamesTanton

An video giving a brief overview of part 5 of an online QUADRATICS course: www.gdaymath.com....

From DrJamesTanton

A video to accompany the text of part 5, lesson 3 of an online QUADRATICS course: www.gdaymath.com....

From DrJamesTanton

The video to accompany lesson 6 of part 4 of an online quadratics course: www.gdaymath.com....

From DrJamesTanton

A video to introduce the text of lesson 3 of part 4 of an online QUADRATICS course: www.gdaymath.com....

From DrJamesTanton

A video overview of Part 4, Lesson 5 of the online QUADRATICS course of www.gdaymath.com....

From DrJamesTanton

A video to accompany Part 5, Lesson 1 of an online QUADRATICS course: www.gdaymath.com....

From DrJamesTanton

The second part of the video to go with the text of Lesson 2 in Part 3 of an online QUADRATICS course: www.gdaymath.com....

From DrJamesTanton

This is a place-holder video for a QUADRATICS course being developed for my new online Math Institute - a resource for educators and students and math enthusiasts. Good quality videos of me explainig the text will soon appear. Check out www.gdaymath.com...

From DrJamesTanton

Here is a video briefly explaining the origin of those weird formulas for the weird notion of hyperbolic trigonometric functions. (It isn't that weird actually!)...

From DrJamesTanton

Here is a video briefly explaining the origin of those weird formulas for the weird notion of hyperbolic trigonometric functions. (It isn't that weird actually!)...

From DrJamesTanton

Quick ... Are you wearing a watch with Roman numerals? Or are you sitting near a grandfather clock, or by a window with a view of a town clock tower? Look at the Roman numerals on the face. What weird thing do you notice?...

From DrJamesTanton

Here it is ... the answer to the National Math Salute! (See the description to the first video as to why this is called a "salute"!)...

From DrJamesTanton

At long last ... here it is on YouTube! I've been spreading the word of this salute for over a decade, but now it is time for the power of social media to take hold and truly make this a national, international, if not, galactic affair! Can you figure o...

From DrJamesTanton

The final video in the suite of divisibility rules. We've done the hard rules (3, 9, 11, 7, 13, 47, 241, etc). Now it is time to make sure we understand the less hard ones too!...

From DrJamesTanton

We have a formula for the sums of integers (one-th powers)1+2+3+...+N, and a formula for the sums of cubes 1^3 + 2^3 + 3^3 + .. + N^3. Here, at last, is a video deriving the formula for the sum of squares 1^2 + 2^2 + 3^2 + ... + N^2 using just simple tech...

From DrJamesTanton

It is good to question the basics and double-check them with your intution. Even the formula A = (1/2)bh is hard to believe in some contexts!...

From DrJamesTanton

What is the probability of rolling a 7, or a 2, or a 5, or a ... with ordinary dice? What is the probability of rolling a 7, or a 2, or a 5, or a ... with Sicherman dice? The same! Here's a lovely renumbering system of dice....

From DrJamesTanton

Let's bring back the vinculum in mathematics! Here's why I say this. And if we are going to insist on teaching jargon to our students, let's add some cool jargon at least: vinculum, obelus, radix, .....

From DrJamesTanton

Here's a quick overview of how I lead the development to the equation of a circle with students. The end of this video contains a zinger - a completely different type of formula for such an equation!...

From DrJamesTanton

The derivative of the formula for the volume of a sphere gives the formule for its surface area. Is it obvious that this should be so? How about the derivative of the volume of a cube? Does it give its surface area? Well NO, and ... YES!!!...

From DrJamesTanton

In the highschool curriculum it is usually assumed that the shortest path between two points is a straight line. Is there any justification for this belief? Here's a wonderful way to think about matters as fun applications of Pythagoras's theorem. It is...

From DrJamesTanton

Here are two results from the geometry of circles that are easily proved as an application of Pythagoras's theorem. A little tidbit worth sharing here....

From DrJamesTanton

Australian summers are mighty hot and railroad tracks, being metal, expand a little in the heat. Here's a little practice question on the Pythagoream theorem with an astounding and unbelievable answer!...

From DrJamesTanton

This is a prototype practice video for a series on problem solving in mathematics, as inspired by the MAA AMC. Better versions to come!...

From DrJamesTanton

This is a prototype practice video for a series on problem solving in mathematics, as inspired by the MAA AMC. Better versions to come!...

From DrJamesTanton

Many popular texts in mathematics describe the game of NIM and the mathematics behind a winning strategy for it. The mathematics can be deep, and confusing, and not all expositions describe a simple and beautiful connection with the powers of two that mak...

From DrJamesTanton

The Mormon Tabernacle in Salt Lake City and the Whispering Gallery in the US Capitol Building are each the shape of an ellipse. This means that if you stood at one focus of the ellipse, each sound wave from a whisper you make will bounce off the wall and ...

From DrJamesTanton

Have you ever wondered in fitting a line to data on a scatter plot that you work to minimise the vertical distances of points from the line - not the actual distances (perpendicular to the line)? Or why you square numbers rather than work with the natural...

From DrJamesTanton

Here is another clever way to multiply two numbers. Can you figure out why it works before I give things away in the second half of the video?...

From DrJamesTanton