Sometimes in science mysteries remain mysteries for a long time! The discovery of diffuse interstellar bands happened nearly 100 years ago, yet it took until 2015 for scientists to understand a single band. Pupils learn about the...

Learning about mythological idioms can be quite an odyssey. The 41st and final installment in the Crash Course World Mythology series makes the topic manageable and interesting. Scholars explore the language of mythology and investigate...

How did people from ancient civilizations make sense of the world around them? The second installment of the Crash Course World Mythology series explores the creation of the universe. Scholars learn about the creation myths associated...

Speed up your learning of distance, rate, and time problems. Future mathematicians view a video to review how to determine distance, rate, or time, given the other two quantities. They watch as the narrator works through several examples.

More power to you if you can calculate volumes. Viewers of an informative YouTube video learn about the volumes of similar three-dimensional figures. They see how figures with sides that have a scale factor of n have volumes with a scale...

Just how similar are the areas of similar figures? An educational YouTube video describes how to determine the areas of similar figures. Given the area of one figure and the measurements of corresponding sides of each figure, viewers see...

Scale up a lesson on similarity. Young mathematicians watch a video that investigates the sides of similar figures. They see how to calculate missing sides from the given measures using scale factors.

Don't flip out over the resource, but be sure to flip the figures. By watching a short YouTube video, scholars learn about reflections in the coordinate plane. They see how to identify the line of reflection given two figures.

Let the machines do what they do best. The 37th installment of the Crash Course Statistics series focuses on unsupervised machine learning. It describes two methods, k-means and hierarchical clustering, and provides examples for each.

Use math to help predict the future. Viewers of the 36th Crash Course video covering statistics hear about machine learning. They see how logistic regression, linear discriminant analysis, and K nearest neighbors are all models that help...

What comes next? Scholars view a video that explains how to determine the next figure in a pattern. They connect the figures to arithmetic sequences and write explicit formulas for the patterns.

Something missing from your knowledge of sequences? Viewers of a short YouTube video learn how to find missing values in a sequence. These include arithmetic and geometric sequences, as well as patterns that do not fit either category.

Have young engineers always wondered how a light bulb works? Now's their chance. Viewers of an illuminating YouTube video learn about electric current, conductivity, and resistance. They see how engineers use low-conductivity conductors...

Exploding billiard balls and fake tanks are just part of the history of polymers. The 20th installment of the Crash Course Engineering series looks at polymers and how people make them. It also takes viewers through a brief history of...

Do you want metal or ceramics for your braces? An informative YouTube video introduces learners to two basic materials, metals and ceramics. It looks at the properties of each material, and also describes ores, alloys, clay, and...

Don't let materials science break you. An informative video explains the mechanical properties of materials. It uses a stress-strain diagram to discuss elasticity, hardness, toughness, creep strength, and fatigue strength. It also...

Don't get separated from a great resource. Scholars view an informative video to learn about mass separation of chemicals in the 17th episode of the Crash Course Engineering series. The video looks at three different methods:...

Mix a great resource in to your engineering repertoire. An engaging video discusses diffusion and mass transfer. It explains how a difference in concentration is the driving force for this mechanism. 

Add a little sizzle to your lesson. The 15th video in the Crash Course Engineering playlist looks at heat exchangers, including concentric tubes, finned tubes, plate heat exchangers, and shell-and-tube heat exchangers. It describes how...

Take it step by step to understand computer science. A set of seven short videos introduces teachers to the CS First curriculum. It describes how to set up a class, describes how to locate teacher materials, and provides information on...

How do myths help explain people's origins and relationships with one another? The fifth installment in the 41-part Crash Course World Mythology video series explores the topic. Viewers discover dualities in myths, including the...

Which came first: the chicken or the cosmic egg? With the third video of 41 in the Crash Course World Mythology series, pupils delve into the world of creation myths. Scholars learn about cultures throughout history that have used the...

While Japan was a major player in the Second World War, it also played a role in the first Great War. Scholars analyze the Anglo-Japanese alliance during World War I in the 30th installment of a 32-part series. Using a short video clip,...

Young historians investigate World War I by watching a short video clip of art created by soldiers. As viewers analyze the pieces a clearer picture of the horrors of war comes to light.