Mr. Andersen describes the major groups on the periodic table.

Mr. Andersen contrasts series and parallel electrical circuits. A simulation is used to visualize electron flow through both circuit types.

In this video Paul Andersen explains how the quantum mechanical model of the atom refined the shell model. Uncertainty of the position of the electron as well as spin forces chemists to create an improved model. In this model the...

In this episode of Crash Course Kids, Sabrina talks about two of the four spheres that make up our planet; The Geosphere and the Biosphere. What's in these spheres? How do they affect us? How do they fit into the puzzle that is Earth?...

Mr. Andersen explains significant digits and shows you how to use them in calculations.

In this video Paul Andersen explains how society influences the natural world through increasing science, engineering and technology. As the world population increases it will require more natural resources and it will impact the global...

Reading slowly -- with her finger running beneath the words, even when she was taught not to -- has led Jacqueline Woodson to a life of writing books to be savored. In a lyrical talk, she invites us to slow down and appreciate stories...

"You're a fishmonger!" By taking a closer look at Shakespeare's words--specifically his insults--we see why he is known as a master playwright whose works transcend time and appeal to audiences all over the world.

New ReviewIn this lesson, we explore the electric potential difference between two locations in the electric field of a point charge — one of the most essential concepts in AP Physics and introductory electrostatics. Using a positive point charge...

New ReviewAlice follows the White Rabbit into Wonderland - she grows, shrinks, cries, meets many creatures and takes part in a Caucus Race.

New ReviewProfessor Hyll tells us the story of how Odin became the wisest entity in the nine realms, from sacrificing an eye for knowledge, to his ultimate sacrifice to bring written word and runes into the world of man.

New ReviewThis video teaches what nouns, verbs, and adjectives are. These are important grammar skills for reading and writing..

New ReviewIn this engaging and informative video, Rob and Susie Dent explore 10 weird and wonderful words from the English language that are both intriguing and delightful. From "confilicity" to "respare" to "Twitterpated," each word is discussed...

New ReviewIn this video, the speaker explores the fascinating world of "ghost words" - words that made it into dictionaries but were never actually used. They discuss the origins and stories behind these ghost words, from Samuel Johnson's mistaken...

New ReviewIn this video, the speaker explores the fascinating world of collective nouns in the English language. From animals to people, he delves into the origins and usage of these unique and sometimes bizarre terms. Discover the history behind...

New ReviewWe use words left behind by the Romans every day. Their encounters with the Germanic tribes caused Latin words to slip into our language before it even became "English". In this video let's explore all the words that we've borrowed from...

New ReviewIn this video, I answer the question, What are Heads of Terms, or Heads of Agreement?

If you are a manager, you will often need to make workplace presentations. These may be small and impromptu presentations - or big set pieces with a large audience. Here then is a short introduction to the most important things to know...

Improve your English with our original drama series. In this episode, you’ll hear real English conversations, learn everyday expressions, and practice listening comprehension in a fun, story-driven format. For learners at the...

This video has kids practice first tapping out sounds to a short vowel word with blends. Then, they map it or turn the sounds into letters, and finally they spell the word. This is great practice for beginning readers and writers and...

Could you read it?

Learn the physics behind ideal fluid flow and the continuity equation—complete with animation, explanation, and a real-life garden hose example.

This video is answering the question of what is a diamante poem.

This video is answering the question of what makes the German language interesting.