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Bears
Take a good look into the lives of bears in this video. It focuses on polar bears and kodiaks. Did you know the reflection of the sun is what makes polar bear fur white?
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A Tour of the Cell
The differences between prokaryotic and eukaryotic cells are explained and the parts of each are highlighted. Discover the major organelles found in an animal cell and each of their functions. Paul Andersen does an excellent job once...
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Photosynthesis
Mr. Anderson, the talented Smart Board presenter and biology teacher, shows a satellite image of where photosynthesis is occurring all over the planet. He draws on a series of computer graphics of the cell and mitochondria as he speaks....
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Exploring Oceans
Did you know that life in the sea generates 70% of our oxygen? If it weren't for the water, we wouldn't be here! Discover underwater mountains and volcanoes and take a glimpse at our negative global impact. What can you do to reverse...
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Biodiversity
Jaguars feed on 87 different species, making it a keystone species. What happens when such a critical link of the food chain goes missing? Mr. Andersen identifies different keystone species according to ecosystem, and he explains the...
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Cell Cycle, Mitosis and Meiosis
Aren't mitosis and meiosis the same thing? A helpful flow chart demonstrates the difference between mitosis and meiosis on Paul Andersen's Smart Board. Time lapse videos include show mitosis and cytokinesis.
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System of Equations for Passing Trains Problem
Here is a challenging motion problem about two different length trains and how long it takes them to pass each other going in the same direction and opposite directions. At first glance, there doesnÕt seem to be enough information given...
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More Advanced Ratio Problem-- with Algebra (HD version)
This lesson is a bit more challenging, but Sal provides an excellent step-by-step explanation. He uses of different colors to help learners follow the process for solving this problem. As he solves one problem, he poses another and...
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Level 1 Multiplying Expressions
Several examples of different types of algebraic expressions are multiplied. The distributive property demonstrates the steps needed to multiply the terms in the expressions. Sal combines the like-terms at the end of the presentation....
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Introduction to Ratios (new HD version)
Sal defines ratios. Then he shows how to write ratios three different ways. This concept is then demonstrated with four examples for finding quantities by using ratios.
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Foci of a Hyperbola
In this video, Sal defines the vertex and the foci of a hyperbola, and shows how to locate both. By comparing the hyperbola to an ellipse throughout the video, the listener sees the similarities between these two conic sections. This...
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Equations 2
"Equations 2" is the second video in this series. It follows the presentation titled "Simple Equations." This presentation shows how to solve slightly more complicated algebraic equations, like Ax+B=C. Sal uses visuals (like a number...
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Conic Sections: Hyperbolas 3
Continuing with the study of graphing hyperbolas, Sal shows an example of graphing a parabola that is centered at a point off the origin. By looking at the equation, first without shifting it, he helps listeners develop an intuitive...
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Conic Sections: Hyperbolas 2
Here is an example in this video of graphing a hyperbola centered at the origin. First, Sal shows solving for the equations of the asymptotes and then shows how to determine the direction of the hyperbola. He takes the approach of not...
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Compound Interest and e (Part 2)
Sal continues to look at changing the length of compounding time, from daily to hourly compounding interest. Now he is able to show that compounding 100% annual interest converges on the number 2.71É or e as the number of compounding...
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Compound Interest and e (Part 3)
Continuing with the lesson on compound interest, in this video, Sal derives the general formula for any amount of principle, interest rate, and compounding periods over one year.
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Circles: Radius, Diameter and Circumference
Fascinating discussion regarding the origin of Pi accompanies a detailed explanation of how to find the circumference of a circle. Since this is the first installment in a series on circles, the concept of circumference is separated into...
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Binomial Theorem (Part 3)
In this video on the Binomial Theorem, Sal tries to give an intuition behind why combinations are part of its definition. By looking at the expansion of (a + b)3 and carefully looking at where each value originates from, one can see how...
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Angles Formed Between Transversals and Parallel Lines, Geometry
While exploring the concept of transversals, Sal discusses corresponding angles, congruent angles, and opposite/vertical angles. He provides a thorough summation of these mathematical concepts. It is the first installment in a series...
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Advanced Ratio Problems
The instructor continues to build ratio problem-solving skills algebraically. The two examples are very involved but are thoroughly explained using algebraic steps.
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How Social Media Can Make History
From Nineteen Eighty-Four, Brave New World, and Fahrenheit 451 to Facebook, Twitter, and TXT. Here’s a must-see video for anyone interested in the transformation of the media landscape and message distribution. The narrator traces four...
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Trigonometry Work Problems (Part 2)
In this part two video, Sal finishes the trigonometric word problem of the wayward ship captain. He wisely continues the algebra work on the problem before finally turning to his calculator for the very last calculation.
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Introduction to Rate-of-Change Problems
Sal solves an example for finding the rate of change of the height of water in a cone at a specific point when it is being filled at a given rate. In this video, Sal reviews the volume of a cone and the chain rule and then, uses these to...
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Polynomial Equations in Factored Form
Sal takes polynomial equations in the other direction with this video where he shows how to factor them instead of adding or multiplying them. He has two goals in this activity: first, to show how to factor polynomial equations, and then...