The word "mole" suggests a small, furry burrowing animal to many. But in this lesson, we look at the concept of the mole in chemistry. Learn the incredible magnitude of the mole--and how something so big can help us calculate the tiniest...

This English language learning video covers the basic use of numbers in everyday language. It introduces ordinal numbers, simple words, expressions, and tips.

In this lesson, students will learn about the relationship between digits in a number and how place value decreases 10 times with each shift to the right. Through the use of number lines, students will understand how to determine the...

In this video, students learn how to multiply fluently by combining known facts. They are taught to break down numbers into smaller parts and use their knowledge of multiplication facts to solve tricky multiplication problems quickly.

This video lesson teaches students how to determine whether a number is even or odd by looking at the digit in the ones place. It explains the concept using visual examples and encourages students to pair objects to determine if they can...

Check if a whole number is divisible by 6.

Hiphughes lays out his top five questions about the JFK assassination. While not a conspiracy nut, the JFK assassination leaves a lot of room for doubt concerning the official Warren Commission story. These are simply questions, please...

The eight principles: #8 A video is more likely to go viral if it is deliberately marketed to the appropriate demographic. In other words, if ads are strategically placed to reach a lot of people guaranteed to already like the video, it...