This video teaches viewers how to solve addition word problems by using variables to write equations. The narrator explains that a letter can represent a number (variable), and demonstrates how to define and solve for unknown variables...

In this video we’re going to look at how we can solve equations using a method called inspection. An equation is a mathematical sentence with two sides that are equal to each other. We solve equations to find the number or numbers that...

Learn how to carry out titration experiments. In this video, you will learn what apparatus needs to be used to conduct a titration, including pipettes, burettes and conical flasks. Titration experiments enable us to work out the exact...

In this video, students learn how to find the missing quotient in a division problem by creating an array. The video explains the relationship between multiplication and division, and demonstrates how to use arrays to solve division...

From the Master of monologue poems, "The Unknown" is my favorite piece in Spoon River Anthology. This reading, summary, and analysis of Edgar Lee Master's poem explores the meaning behind the unnamed speaker's tragic journey through life...

In this video, the teacher explains how to make estimates about a population with an unknown characteristic by using the mean of multiple samples. The teacher demonstrates the process of setting up a proportion and calculating the mean,...

In this video, the teacher explains how to solve word problems involving addition and subtraction of mixed numbers by creating number lines. The teacher provides step-by-step instructions on how to identify key information, draw a model,...

In this video, students learn how to solve equal groups word problems by drawing a bar model. The video provides step-by-step examples of how to use the bar model to solve problems involving equal groups, such as dividing books evenly...

In this video, students are raising money to purchase more books. The graph shows the amount of money raised by each grade. The teacher demonstrates how to use the modeled drawing strategy to find the total amount of money raised by two...

In this video, the teacher explains how equations can help us find missing angles in real-world situations, using the example of floor tiles. By examining the patterns and shapes, the teacher demonstrates how to determine the measure of...

In this lesson, students will learn how to solve for unknown amounts using the commutative property of multiplication. They will understand that the order of the factors can be switched without changing the product.

In this video, students learn how to solve for unknown amounts using addition and subtraction fact families. Through examples and step-by-step instructions, they will understand how to use fact families to find missing addends and...

In this video, the teacher explains how to write algebraic expressions for real-world scenarios. They review the concept of variables and expressions, as well as the difference between equations and expressions.

Learn how to use proportional reasoning to estimate the number of t-shirts of each size to order for a field day. Review the concept of random sampling and how it helps in making valid inferences about the entire population. Explore how...