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...

Viruses might be deadly, but they appear beautiful when analyzed geometrically. View the shapes, colors, and structures of a few viruses. The repeating structures and genes help to identify them along with genomic information.

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...

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...

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.

Seeing structure in the patterns is key to understanding the unit circle, and it takes time to become comfortable with those relationships. The video gives learners access to repeated instruction to allow time to develop those...

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. 

Imagine traveling 4,000 years into the future to a time when all knowledge of the English language has been lost. Computational neuroscientist Rajesh Rao uses this hypothetical situation to engage the audience as he discusses...

Building upon the previous video about structure, this resource lays the building blocks for generating an action potential and transmitting a signal from dendrites through the axon. The topics are pretty detailed. Salman Khan also talks...

The featured movie focuses on the ancestry of our four-footed friends. Find the fundamental pattern of their limbs and vertebrae in fossils of fish. After viewing, biology learners can enjoy interactive websites to zoom in on the...

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.

Insects developed wings and the ability to fly earlier than any other animal—when exactly did that happen? Scientists know this fact but struggle to explain when insect wings developed and how this entirely new structure appeared. PBS...

An instructive video explains the covalent bond patterns in methane, ammonia, water, and hydrogen fluoride. It includes their structures, two different methods for displaying their structures, their properties, and the reasons...

Winds that flow at high altitudes for many miles, sometimes around the entire Earth, obtained the name jet streams. Scholars view three different visualizations of jet streams: one focusing on North America, one focusing on Asia, and the...

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...

Kilobots, made from only $15 worth of parts, work together to achieve a group goal. The video explains how with a few simple lines of programming, these tiny robots tackle tasks in much the same way animals or cells have for centuries....

Parallel structure isn't a set rule, but more of a stylistic choice: it helps sentence elements maintain a pattern. This is a very special episode because it's Paige's last video with us as a KA intern! We will miss having Paige as a...

Determining whether a polynomial expression can be factored using the perfect square pattern or the difference of squares pattern (or neither). [5:50]

Teaches strategies for learning the multiplication facts for 3. Students are then presented with a multiplication facts drill where they practice along to the video. A follow-up lesson goes over missing number problems, a word problem,...

Teaches strategies for learning the multiplication facts for 4 up to 12 x 4. Students are then presented with a multiplication facts drill where they practice their mental math along to the video. [7:28]

Teaches strategies for learning the multiplication facts for 5 up to 12 x 5. Students are then presented with a multiplication facts drill where they practice their mental math along to the video. [6:38]

Teaches strategies for learning the multiplication facts for 11 up to 12 x 11. Students are then presented with a multiplication facts drill where they practice along to the video. [4:21]

Teaches strategies for learning the multiplication facts for 7 up to 12 x 7. Students are then presented with a multiplication facts drill where they practice along to the video. [7:45]

Teaches strategies for learning the multiplication facts for 12 up to 12 x 12. Students are then presented with a multiplication facts drill where they practice along to the video. [6:54]