Khan Academy
Khan Academy: Chemistry: Other Periodic Table Trends
A video lecture discussing the trends on the periodic table dealing with ionization energy, electronegativity, metallic nature, and atomic radius size. The video shows how electronegativity increases to the top right of the periodic...
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Khan Academy: Probability: Permutations
Video lesson introducing permutations by looking at examples and the formula. [10:11]
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Khan Academy: Trigonometry: Navigation Word Problem
Video showing how to solve a navigation word problem with speeds and distances using trigonometry. [8:00]
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Khan Academy: Algebra: Alternate Solution to Ratio Problem
A step-by-step demonstration on an alternate method for how to solve a ratio problem algebraically with cross multiplication. [7:02]
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Khan Academy: Algebra: Algebra Ii: Functions, Combinatorics
Video solving problems 60 to 65 of the California Standards Test for Algebra II. Concepts covered include negative exponents, square root equations and inequalities, permutations, and probability. [11:25]
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Khan Academy: Algebra: Parallel Lines 3
This video demonstrates how to determine if lines are parallel given the equations. There are three equations listed but they are not all in slope-intercept form. Practice problems available. [2:42]
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Khan Academy: Algebra: Basic Linear Function
This video demonstrates how to take a word problem and write a linear function that represents the problem. This video is also found in the strand Algebra: Functions. [2:42]
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Khan Academy: Algebra: Multiplying Polynomials
Video demonstrates how to use the distributive property to multiply a binomial and a trinomial. Also shows how to multiply using a vertical format. Practice problems available. [5:46]
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Khan Academy: Chemistry: Redox Reactions
Study redox reactions in this video. Several examples of reactions are given showing how to determine a compound's oxidation state and whether it was reduced or oxidized. Also students will understand how to determine whether the...
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Khan Academy: Chemistry: Hydrogen Peroxide Correction
A follow up to an error made in a previous video( Khan Academy: Chemistry: More on Oxidation States) where the oxidation state of oxygen in hydrogen peroxide was shown incorrectly. This video explains the correct oxidation state for...
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Khan Academy: Biology: Atp: Adenosine Triphosphate
An introduction to ATP, or adenosine triphosphate. [13:35]
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Khan Academy: Algebra: Dividing Multivariable Polynomial With Monomial
Video demonstrates how to divided a multivariable trinomial by a multivariable monomial. [3:14]
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Khan Academy: Trigonometry: Determing the Equation of a Trigonometric Function
Video about finding the equation of a trigonometric function from its graph. Two examples are sine functions and one example is a cosine function [9:52]
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Khan Academy: Chemistry: Periodic Table Trends: Ionization Energy
The energy to remove an electron, or ionization energy, is explained. [12:13]
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Khan Academy: Arithmetic and Pre Algebra: Subtraction 3: Borrowing or Regrouping
A video covering a review of subtraction using a number line, followed by subtraction of numbers up to three-digits by using borrowing and regrouping. Practice problems available. [18:26]
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Khan Academy: Algebra: Algebra Ii: Functions and Probability
Video solving problems 70 to 75 of the Californa Standards Algebra II Test. Concepts covered include arithmetic sequences and series, writing the expression for a composition of functions and evaluating the composition of functions,...
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Khan Academy: Trigonometry: Using Trig Functions
Video using the basic trigonometric functions to find the length of a side in a right triangle. Examples are given with angle measures in radians. Includes link to additional practice problems. [10:03]
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Khan Academy: Algebra: Applying Quadratic Functions 1
Video solving an application problem that uses a quadratic function to represent a cable that connects two towers. Problem is solved by finding the vertex of the parabola and applying that information. [4:39]
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Khan Academy: Algebra: Linear Equations in Point Slope Form
This video gives several examples of how to write a linear equation in point-slope form given two points on the line. This video is also found in the strand Algebra: ck12.org. [9:38]
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Khan Academy: Arithmetic and Pre Algebra: Dividing Fractions
This video explains how to divide two fractions. Practice problems are available. [8:59]
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Khan Academy: Trigonometry: Proof: Sin(a+b)=(cos A)(sin B) + (Sin A)(cos B)
Video demonstrating the proof for the formula for the sine of the sum of two angles. Includes link to additional practice problems. [9:48]
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Khan Academy: Algebra: Simplifying Expressions With Exponents 3
Video finding the volume of a cube with sides that are an algebraic expression involving exponents. [2:31]
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Khan Academy: Healing After a Heart Attack
Khan Academy's Vishal Punwani presents a lesson about how the heart and body heal following a heart attack, or myocardial infarction. [7:42]
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Khan Academy: Risk Factors for Stroke
A Khan Academy lesson identifies the risk factors for strokes. [11:37]