Developing an informational text is like designing a building—if the structure is weak, it will not stand. A language arts video provides an overview of the five types of text structure. A catchy song and specific examples help give a...

There's nothing regular about them—irregular verbs turn out to be the most common verbs in the English language. Through an analysis of data, learners discover that Zipf's Law describes the patterns of word usage. 

When we take things apart, we can learn how they work. Physicist Clifford Johnson explains how we break down all objects into elementary particles of matter and forces. Patterns have been identified with the particles, the existence dark...

The dengue virus looks like a ball with multiple layers. View an animation of each layer while hearing a description of its properties, from the outer symmetrical units to the lipid envelope, the capsid, and finally the RNA genome.

What do amazonite, heliotrope, carnelian, and diamonds have in common? There are all crystals and members of one of the six crystal families. Viewers of a fascinating short video learn about the molecular structure of crystals that cause...

What is Ramsey Theory? High schoolers view a video that opens the door to the explanation of hidden messages in patterns, and how our brains can make interpretations for things unintentionally.

Practice is an important learning tool. This practice problem allows students to apply their know-how to factoring a binomial with a difference of squares. Sal explains his process briefly, making this video suitable for those already...