Instructional Video16:35
Catalyst University

Factors that Affect Diffusion Rate

Higher Ed
In this video, we will discuss four factors that affect the rate of diffusion: molecular weight, concentration gradient, surface area-volume ratio, and the temperature.
Instructional Video4:46
Curated Video

Finding Square Roots of Perfect Squares

K - 5th
In this video, the teacher explains how to find the square root of perfect squares by visualizing squares and using new notation. They also discuss the definition of a square root and explain why not all numbers have exact square roots....
Instructional Video5:01
Curated Video

Finding the Square Root of Perfect Squares

K - 5th
In this video, the teacher explains how to find the square root of numbers that are perfect squares. They introduce the square root symbol and explain that it represents the side length of the square formed by the perfect square. They...
Instructional Video3:02
Professor Dave Explains

Proving the Pythagorean Theorem

9th - Higher Ed
One easy demonstration that proves the validity of the Pythagorean theorem.
Instructional Video4:34
Curated Video

Calculating Surface Area of Rectangular Prisms

K - 5th
In this video, the teacher explains how to calculate the surface area of a rectangular prism by analyzing its six faces and computing their areas. The teacher demonstrates the process using examples of different rectangular prisms,...
Instructional Video5:02
Curated Video

Understanding Perfect Cubes and Cube Roots

K - 5th
In this video, the teacher explains how to determine if a number is a perfect cube and how to find its cube root. The teacher uses the analogy of squares and cubes to illustrate the concept and provides examples and practice problems to...
Instructional Video4:36
Professor Dave Explains

Proving Triangle Congruence and Similarity

9th - Higher Ed
Working with triangles.
Instructional Video4:57
Curated Video

Estimating Square Roots by Comparing to Perfect Squares

K - 5th
In this video, students learn how to estimate the value of square roots by comparing them to perfect squares. The teacher explains the concept of irrational numbers and demonstrates the process of finding two perfect squares on either...
Instructional Video7:31
Curated Video

Converting the Equation of a Circle from General Form to Standard Form

K - 5th
In this video, the teacher explains how to convert the equation of a circle from general form to standard form using algebra. They demonstrate the process of completing the square to create perfect square trinomials and then simplify the...
Instructional Video3:51
Curated Video

Interpreting Scatter Plots: Linear or Nonlinear Relationships

K - 5th
In this lesson, students will learn how to interpret scatter plots by determining if they are linear or nonlinear. By analyzing the shape of the graph, students will be able to identify whether the relationship between the variables is...
Instructional Video4:37
Curated Video

Finding the Perimeter of Polygons with More than Four Sides

K - 5th
In this video, students are taught how to find the perimeter of polygons with more than four sides by adding the side lengths. The teacher emphasizes the difference between perimeter and area, and highlights common mistakes students...
Instructional Video6:34
Curated Video

Using the Area of Squares Proof to Relate Side Lengths of a Right Triangle

K - 5th
In this lesson, students will learn about the relationship between the side lengths of a right triangle using the area of squares proof. They will understand that the sum of the areas of the squares formed by the two legs of a right...
Instructional Video5:17
Curated Video

Solving Non-Right Triangles Using the Law of Sines

K - 5th
In this video, you will learn how to find the missing side lengths of a non-right triangle using the Law of Sines. The Law of Sines relates the angle measures and side lengths of an oblique triangle.
Instructional Video4:55
Curated Video

Understanding Rational and Irrational Numbers

K - 5th
In this video lesson, the teacher explains the difference between rational and irrational numbers. The teacher provides examples and guides the viewer in determining whether a given number is rational or irrational.
Instructional Video4:30
Professor Dave Explains

The Pythagorean Theorem

12th - Higher Ed
Practicing the pythagorean theorem.