Best educational videos to complement children’s learning. Instructional and ‘how to’ videos that explain concepts and help build essential skills. Find thousands of Khan academy videos, Lumos Learning videos along with many other interesting resources from top publishers. Recommend helpful videos to colleagues, friends, or students. Share feedback and submit reviews.
Telling time word problems with the number line
By Khan Academy
Use a number line to tell time and find the duration of an event.
Understanding place value 1 exercise | Arithmetic properties | Pre-Algebra | Khan Academy
By Khan Academy
Here we have a few example exercises in which we are asked to compare place values and determine which are larger or smaller, and by what factor of ten. Let's do it together.
Volume 1
By Khan Academy
Let's do some example problems together in which we use the area times length formula for finding volume.
Understanding moving the decimal
By Khan Academy
Holy cow! A shortcut? Yep. For each ten you multiply or divide by, just shift that decimal to the right or left. Watch this and be amazed.
Visualizing and interpreting relationships between patterns
By Khan Academy
Now we're visually plotting ordered pairs based on sequence relationships. The sequence is based on given rules. You're good at following rules, right? Of course you are!
Systems of linear equations word problems
By Khan Academy
Sal answers a word problem about a vegetable farmer and finds that it has infinite solutions.
Equivalent systems of equations
By Khan Academy
Sal analyzes a couple of systems of equations and determines whether they have the same solution as a third given system.
Addition and subtraction trig identities
By Khan Academy
Sal evaluates the cosine of the sum of 60������������ and another angle whose right triangle is given. To do this, he must use the cosine angle addition formula.
Unit vectors
By Khan Academy
Learn what a unit vector is and how to find a unit vector in the direction of a vector.