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Brian McLogan
Translating subtraction using less than, 19 less than z
👉 Learn how to write an algebraic expression from verbal sentence as well as writing out a sentence from a algebraic expression. To do this we need to know what words we use to express operations such as addition, multiplication,...
Brainwaves Video Anthology
Angela Duckworth - Teachers Make a Difference - Mr. Carr
Angela Duckworth is the Founder and CEO of Character Lab, a nonprofit whose mission is to advance the science and practice of character development. She is also the Christopher H. Browne Distinguished Professor of Psychology at...
Age of Learning
The Letter Z Song
An alphabet doo-wop group sings a tune all about the letter Z. Words appear alongside captivating graphics set to a rock 'n' roll beat.
Khan Academy
SAT Prep: Test 4 Section 2 Part 3
Continuing his theme of solving problems in a timely and correct manner, Sal teaches students that most problems on the SAT are designed to be solved in less than 30 seconds (though he does state that they are given over a minute for...
Little Baby Bum
Numbers Song: Number 5
The number five is the focus of a captivating music video that showcases the number in a variety of ways—number form, word form, it spells the word, counts, and displays each numbers leading up to five.
Khan Academy
Example 1: Factoring a Difference of Squares with Two Variables, Algebra II
Practice is an important learning tool. This practice problem allows students to apply their know-how to factoring a binomial with a difference of squares. Sal explains his process briefly, making this video suitable for those already...
Khan Academy
Complex Conjugates, Imaginary and Complex Numbers, Precalculus
Sal discusses the usefulness of the conjugate of the complex number in this video. First, he shows how to add a complex number and its conjugate graphically and algebraically. Then, he shows how to simplify a rational expression with...
Khan Academy
Khan Academy: Pre Calculus: Complex Determinant Example
A video showing the step-by-step solution to a difficult determinant problem from the IIT-JEE. This is problem 53 from Paper 1 of the 2010 exam. A 3 X 3 matrix is given in terms of z and omega, where omega is defined as a complex number...