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...

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