Khan Academy
Khan Academy: Chemistry: Introduction to Stoichiometry
Work through balancing equations with this video module. As equations are worked suggestions and steps are given to help students develop techniques to balance chemical equations. [14:28]
Khan Academy
Khan Academy: Trigonometry: Using Trig Functions Part Ii
Continuation of video lesson using the basic trigonometric functions to determine unknown side lengths of a right triangle. Example shows using trigonometry as well as the Pythagorean Theorem to find the length of the third side of the...
Khan Academy
Khan Academy: Algebra: Problem Solving Word Problems 2
A video that demonstrates how to set up and solve systems of equations in order to answer word problems. [12:20]
Khan Academy
Khan Academy: Algebra: Simplifying Radical Expressions 3
Video simplifying the cube root of an algebraic expression by identifying perfect cubes. [3:09]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: 2 Digit Subtraction
This video shows subtraction of two-digit numbers and place value to tens. [2:54]
Khan Academy
Khan Academy: Algebra: Level 1 Multiplying Expressions
Demonstrates how to multiply two binomials by applying the distributive property. Four different examples are worked out. Practice problems available. [7:58]
Khan Academy
Khan Academy: Arithmetic and Pre Algebra: Addition 2
This video covers addition by counting and using a number line, followed by place value concepts and addition of two-digit numbers. Practice problems are available. [12:26]
Khan Academy
Khan Academy: Algebra: Quadratic Functions 3
Video graphing a parabola by plotting the roots, vertex and axis of symmetry. Roots of the quadratic function are found by factoring. Vertex of the parabola is found by three different methods: taking the midpoint of the roots, finding...
Khan Academy
Khan Academy: Algebra: Perpendicular Lines 2
This video demonstrates how to find the equation of a line when given a point on the line and the equation of a line perpendicular to it. Practice problems available. [3:01]
Khan Academy
Khan Academy: Algebra: Completing the Square 1
Demonstrates how to use the completing the square method to identify a constant value for a given trinomial to create a perfect square trinomial. Practice problems available. [3:22]
Khan Academy
Khan Academy: Algebra: Completing Perfect Square Trinomials
Explains how to use the completing the square method to determine what constant value can be added to a given polynomial to create a perfect square trinomial. [3:28]
Khan Academy
Khan Academy: Pre Calculus: Sequences and Series (Part 2)
This video follows from Khan Academy: Sequences and Series (Part 1) and furthers the idea of the basic geometric series. Explains how to find the sum of both a finite and an infinite geometric series. Uses limits to find the sum of an...
Khan Academy
Khan Academy: Algebra: Evaluating Exponential Expressions 3
Video evaluating an exponential expression using the order of operations. Includes negative exponents. [4:26]
Khan Academy
Khan Academy: Applications of Similar Triangles
Explains how to solve a given word problem that involves similar triangles. The problem requires that two unknown side lengths be determined. [5:34]
Khan Academy
Khan Academy: Pre Calculus: Limit Examples (Part 3)
Video addresses limits of rational functions that can be simplified by factoring. Also provides examples of how to find the limit of a function as x approaches infinity. Includes link to practice problems. This video is also found in the...
Khan Academy
Khan Academy: Trigonometry: Proof: Cos(a+b)=(cos A)(cos B) (Sin A)(sin B)
Video demonstrating the proof for the formula for the cosine of the sum of two angles. Includes link to additional practice problems. [9:22]
Khan Academy
Khan Academy: Algebra: Introduction to Functions
Video giving a general overview of the concept of a function by discussing inputs and outputs. Shows function notation, an example of a piece-wise function and how to evaluate at certain points as well as how to evaluate a composition of...
Khan Academy
Khan Academy: Statistics: Binomial Distribution 3
Video demonstration of finding the binomial distribution for an example about shooting six free throw shots by calculating the probabilities of each number of shots that were made. Video is also listed in the Probability section of Khan...
Khan Academy
Khan Academy: Fetal Circulation: Meet the Placenta!
Learn how the needs of the fetus are met by the placenta, which is a special organ that belongs to both the mother and the fetus! Rishi is a pediatric infectious disease physician and works at Khan Academy. [12:29]
Khan Academy
Khan Academy: Electronegativity: Electronegativity and Intermolecular Forces
Looks at how to discern whether molecules are polar or non-polar, and how to apply that polarity to intermolecular forces. [8:35]
Khan Academy
Khan Academy: Algebra: Integer Sums
This video shows how to set up a linear equation to determine the value of unknown consecutive integers. There are two examples given that also demonstrate how to solve these equations. [9:56]
Khan Academy
Khan Academy: Algebra: Algebra Ii: Simplifying Polynomials
Video demonstrates solutions to four problems from the California Algebra II released state test questions including factoring polynomial expressions, adding and dividing rational expressions, and applying exponent rules. [10:19]
Khan Academy
Khan Academy: Chemistry: Formula From Mass Composition
Learn how to calculate the empirical formula of a compound by knowing the mass composition. The video gives two step-by-step examples of how to figure out the empirical formula. [12:58]
Khan Academy
Khan Academy: Algebra: Functions Part 2
Video evaluating combinations and compositions of functions including a piece-wise function. Focus is on understanding function notation. Includes link to additional practice at the top of the video. [9:54]