Khan Academy
Khan Academy offers practice exercises, instructional videos, and a personalized learning dashboard that empower learners to study at their own pace in and outside of the classroom. We tackle math, science, computing, history, art history, economics, and more, including K-14 and test preparation (SAT, Praxis, LSAT) content. We focus on skill mastery to help learners establish strong foundations, so there's no limit to what they can learn next!
Resources from Khan Academy
Descriptive statistics
This is the foundational tutorial for the rest of statistics. We start thinking about how you can represent a set of numbers with one number that somehow represents the “center”. We then talk about the differences between populations, sam...
Cells
2A: Not all shall pass! Yards have fences, and cells have membranes. You don’t want just anybody waltzing into your backyard. Similarly, a healthy cell doesn’t just let in any random molecule - this is the concept of selective permeability. Som...
Two-dimensional motion
You understand velocity and acceleration well in one-dimension. Now we can explore scenarios that are even more fun. With a little bit of trigonometry (you might want to review your basic trig, especially what sin and cos are), we can think about whe...
Introduction to algebra
Did you realize that the word 'algebra” comes from Arabic (just like 'algorithm” and 'al jazeera” and 'Aladdin”)? And what is so great about algebra anyway? This tutorial doesn't explore algebra s...
Nervous system diseases
Parkinson's disease What is Parkinson's disease? (Article) What is Parkinson's disease? (Video) Movement signs and symptoms of Parkinson's disease (Video) Non-movement symptoms of Parkinson's disease (Video) The bas...
Equations and geometry
Do the angles in a triangle always add up to the same thing? Would I ask it if they didn't? What do we know about the angles of a triangle if two of the sides are congruent (an isosceles triangle) or all three are congruent (an equilateral)? Th...
Respiratory system diseases
Our lungs are composed of a bronchial tree (think of an upside down tree with millions of leaves), blood vessels bringing blood in and out, and a protein-rich fluid that forms a matrix holding everything together! If any part of this well-balanced or...
Chemical reactions and stoichiometry
We are now going to look at chemical reactions. But as we do, we need to make sure that atoms aren't magically appearing or disappearing. Put another way, we need to sure that we have the same number of each constituent atom in the product of t...
HTML/JS: Making webpages interactive with jQuery
Learn how to use jQuery, the world's most popular JS browser library, to add interactivity to your webpages....
Basic geometry
Let's draw points, lines, line segments, and rays. We'll also think about perpendicular and parallel lines and identify these in two-dimensional figures. Common Core Standard: 4.G.A.1...
Studying for the AP Biology exam?
Prepare for the AP Biology exam by going through real free-response questions from the 2015 exam with Sal!...
Intro to HTML/CSS: Making webpages
Learn how to use HTML and CSS to make webpages. HTML is the markup language that you surround content with, to tell browsers about headings, lists, tables, etc. CSS is the stylesheet language that you style the page with, to tell browsers to change t...