Through real world footage and animated graphics, this video explains what molecular clocks are and how they are used. The program discusses molecular clocks' calibration and their reliability. In addition, students are provided with...

I love my new Lego Research Institute Kit! Making all three scientist sets for camera didn't seem to do the characters justice, so I hope you enjoy the additional story of Paleaontologist, Mary Anning!

In this video, the teacher explains how to use scale maps and scale models to find the actual distance between two points or the dimensions of an object. They demonstrate how to calculate the distance using unit rates and provide...

In this video, students learn how to use circle models to find equivalent fractions. The teacher demonstrates the concept by comparing fractions using circle models of pizzas. Through shading and dividing the pizzas, students can...

Learn the basics about the law of the conservation of mass, when learning about properties of matter. The Law of Conservation of Mass says that in chemical reactions no matter is lost or gained. The law of conservation of mass means that...

What are some of the limitations of current climate models?

How do scientists know if computer models are simulating climate change correctly?

In this video, the teacher explains how to solve problems involving quadratic functions using a table of values. They use an example of an object launched upward to demonstrate the process. The teacher emphasizes the importance of...

In this video, students learn how to represent decimal numbers using a number line. The video explains how to divide the number line into equal parts to represent different decimal values, such as tenths and hundredths. It also...

Many outlet glaciers in Greenland feed ice from the land into fjords, where discharge of icebergs and melting of the glaciers by warmer ocean waters contribute to rising sea levels. David Holland of NYU studies what happens in the fjord...

In this lesson, students will learn how to divide fractions by other fractions using models. The teacher explains the concept by using examples and drawing visual representations to help students understand the process.

In this lesson, students will learn how to divide mixed numbers by fractions using models. The teacher demonstrates how to use rectangular models to represent the numbers and visually divide them into groups.

In this lesson, mathematicians learn how to divide whole numbers by fractions using models. They are taught to think of the division as how many groups of the fraction are in the whole number.

This video teaches students how to create equivalent fractions using fraction models. It explains that fractions are equivalent if they represent the same amount, even if the numerators and denominators are different.

Physics teacher and solar astronomer Simon Foster explores how we developed our understanding of the universe and uses our changing models of the solar system to explain how science works.



On location on top of a volcano in...