It explains symbols of electric components, combination of cells and circuit diagram of various electric circuits.

This video explains how to find the resultant of two forces acting at an angle to each other and how to resolve a single force into two components. The presenter demonstrates how to use a scale drawing to represent the forces and how to...

Why do engagement rings exist? And why do engagement rings have diamonds? It turns out, betrothal rings are much older than diamond engagement rings. Before the late 19th century, diamond engagement rings were uncommon, even though...

In this lesson, students learned about arithmetic sequences and how to find the explicit rule for a given sequence. They also practiced evaluating arithmetic sequences and finding specific terms. By understanding the concept of a common...

This video explains Binary Coded Decimal (BCD) and Excess-3 code using examples for the tutorial of Digital electronics. 21 in decimal is converted to BCD and 5 in decimal is converted to Excess-3. Examples are solved to make the viewer...

Learn about the energy levels and electronic configurations of atoms of different elements in this video from the Properties of Matter chapter of the Virtual School GCSE Chemistry.

This lesson looks at the electronic configurations of elements in the periodic tables. Electrons are arranged in energy levels or shells around the nucleus of an atom. As we increase the atomic number and progress through the first...

When a radioactive atom goes through alpha or beta decay, the atom itself changes into a different element. For example, carbon-14 decays to nitrogen-14 when it emits beta radiation. It’s impossible to predict when an individual atom...

Learn the basics about Energy Levels and Electron Configuration. Where do you find energy levels? How do you recognize electron configuration? Find out more in this video!

An introduction to sequences, factorials, and summation notation.

Being able to read music is one thing, but being able to write music is a completely different matter discussed in this video.

Video: Number Lines | Finding Sums and Differences on a Number Line

Grade Levels: 2nd Grade, 3rd

Grade

Rob is back riding his bike as he learns about adding and subtracting on the number line to measure his...

In this video, students learn how to subtract numbers within 100 using base 10 blocks. The teacher explains the concept of place value and demonstrates how to break apart numbers to make subtraction easier.

In this video, the teacher explains how to draw inferences by analyzing data on a dot plot. Using the example of two class periods' study times for a biology final, the teacher emphasizes the importance of considering multiple aspects of...

So we have made it through the dark ages, and are now a few hundred million years into the lifetime of the universe. There are plenty of stars all over the place, but are they all the same? How can we classify stars? Let's go through the...

What are all these funny little arrows? They're vectors! And we will use them to represent every single force we discuss in physics, so we need to know how to draw them, add them, subtract them, split them up into X and Y components, the...

If we are going to tell the story of medicine, we had better start at the beginning, which means we need to go all the way back to the start of recorded history. Every since we've been writing things down, we've been documenting our...

In this video, students learn how to read and write decimals using base 10 blocks. The video explains that decimals represent parts of a whole, and demonstrates how to read and interpret decimal numbers. It also introduces the concept of...

In episode 59, Jordan and Charlie take a look at new research about at how we read. Researchers at the University of California, Davis, have come up with a way to observe brain activity during natural reading. This marks the first time...

In this lesson, students will learn how fractions and division are related by examining and manipulating fraction models and pictures. They will understand that fractions represent a specific number or quantity, and can be represented as...

In this video, the teacher explains how to organize and simplify algebraic expressions by combining like terms. They use visual models with boxes and cookies to represent variables and constants. The teacher demonstrates the use of the...

This video explains how to use a function table to represent the relationship between two variables. Students will review the concepts of independent and dependent variables, coefficients, and how to determine the relationship between...

In this video, the teacher explains how to divide complex polynomials using the TI-89 Titanium computer algebra system. They demonstrate how to input exponents and radicals correctly and use the algebra menu to display the quotient,...

In this video, the teacher explains how to construct a linear function using a table. They define what a linear function is and discuss its different representations. The teacher then demonstrates how to find the slope and y-intercept...