Why isn't the sky violet?

How does knowledge grow? Sometimes it begins with one insight and grows into many branches; other times it grows as a complex and interconnected network. Infographics expert Manuel Lima explores the thousand-year history of mapping data...

Why can't two slices of pizza be used as a slide clicker? Why shouldn't you make music with ketchup? In this charming talk, inventor Jay Silver talks about the urge to play with the world around you. He shares some of his messiest...

This video recounts a lecture by Richard Feynman giving an elementary demonstration of why planets orbit in ellipses. See the excellent book by Judith and David Goodstein, "Feynman's lost lecture”, for the full story behind this lecture,...

In this video Paul Andersen explains the major phases of meiosis including: interphase, prophase I, metaphase I, anaphase I, telophase I, cytokinesis, interphase II, metaphase II, anaphase II, and telophase II. He explains how variation...

The previous videos in this series:

Chapter 1: Why Relativity is
Hard
Chapter 2: Spacetime

Diagrams

This video is chapter 3 in my series on special relativity, and it covers boosts, galilean transformations,...

You might already know that proteins are a fundamental part of your diet, but they're much more than that.

This is episode 9 of our animated series "Think Like A Coder." This 10-episode narrative follows a girl, Ethic, and her robot companion, Hedge, as they attempt to save the world. The two embark on a quest to collect three artifacts and...

In this video Paul Andersen explains how modeling instruction can be used in the science classroom. Instead of presenting a model for the students the teacher presents and experience or experiment and the students develop the model.

What is a differential equation, the pendulum equation, and some basic numerical methods

Today Phil’s explaining the stars and how they can be categorized using their spectra. Together with their distance, this provides a wealth of information about them including their luminosity, size, and temperature. The HR diagram plots...

New ReviewIn this video, I answer the question, what is a Role-Activity Diagram (RAD)? It's a process mapping tool; so let's see how it works. These are also known as Swimlane Process Diagrams. Swimlane Process Diagrams are the same as Role...

New ReviewIn an earlier video, I described how to create a Work Breakdown Structure (WBS). In this video, I will show you how to turn it into a network diagram.

New ReviewIn this lesson, Mrs. C walks you step by step through **finding the area of composite figures**—shapes made up of two or more simple figures like squares, rectangles, triangles, and semicircles. You’ll learn how to: Break a composite...

In this short video we will answer a standardized math test question using similar triangles to find a unknown angle. We will begin by reviewing the definition of similar figures. We will identify the corresponding angles and use the...

In this shorts video we will find an unknown side length. We are given a pair of triangles and told they are similar figures. Using the definition of similar figures, similar figures have corresponding sides that are proportional, we...

In this short math video we will discuss similar triangles & proportionality. We will understand that if two figures are similar that their corresponding sides are proportional. We will identify the corresponding sides and write a...

In this short math video we will find the radius of a cone. We will be given the volume and the height of a cone. We will identify the formula for the volume of a cone. We will rewrite the formula using the giving values for the...

In this video, understand how to align STP and HSRP configurations for optimized network performance.

In this video, use the "show mac address-table" command to troubleshoot and verify STP operations.

In this video, discover how Layer 3 switches enable Inter-VLAN routing without the need for a router.

Pupil outcome: I can create circuit diagrams to represent logic circuits that solve a problem. Key learning points: - A logic circuit is a set of two or more logic gates that are connected to implement more complex logic. - A digital...

Pupil outcome: I can construct a truth table to represent a Boolean expression or circuit. Key learning points: - A truth table is a way of summarising and checking the logic of a circuit. - The table shows all possible combinations of...

Pupil outcome: I can recognise a circle as a collection of points equidistant from a fixed point. Key learning points: - A pair of compasses can be used to draw circle with a particular radius. - All the points on the circle will be the...