Recently added videos

14:42
The Golden Ratio
/ 329 viewsAn introduction to one of the most amazing ideas/numbers in mathematics More free lessons at: http://www.khanacademy.org/video?v=5zosU6XTgSY

07:12
Gravity for Astronauts in Orbit
/ 305 viewsWhy do astronauts appear weightless despite being near the Earth? More free lessons at: http://www.khanacademy.org/video?v=oIZVixRTcY

06:01
Visualizing Taylor Series Approximations
/ 361 viewsUsing Wolfram Alpha to approximate sin(x) More free lessons at: http://www.khanacademy.org/video?v=8dMLK2Wueaw

20:47
How Earth's Tilt Causes Seasons
/ 358 viewsHow being Earth's tilt causes seasons More free lessons at: http://www.khanacademy.org/video?v=05qDIjKevJo

07:22
Vitamin C and the Limeys
/ 291 viewsSal and Dr. David Agus talk about the history of Scurvy and Vitamin C

11:15 Popular
SOPA and PIPA
/ 984 viewsWhat SOPA and PIPA are at face value and what they could end up enabling More free lessons at: http://www.khanacademy.org/video?v=tzqMoOk9NWc

10:07
The Beauty of Algebra
/ 270 viewsWhy the abstraction of mathematics is so fundamental More free lessons at: http://www.khanacademy.org/video?v=kpCJyQ2usJ4

14:18
Mortgage Interest Rates
/ 296 viewsOverview of the main types of mortgages and rates More free lessons at: http://www.khanacademy.org/video?v=vy_pvstdBhg

09:01
Inflation Overview
/ 323 viewsOverview of price inflation and how it is calculated More free lessons at: http://www.khanacademy.org/video?v=Z5kkfrEc8I

08:17
Time Value of Money
/ 257 viewsOverview of the time value, present value and future value of money More free lessons at: http://www.khanacademy.org/video?v=733mgqrzNKs

09:00
401(k)
/ 298 views401(k)s (and how they compare to IRAs) More free lessons at: http://www.khanacademy.org/video?v=2zfdtmlMNDs

07:12
Annual Percentage Rate (APR) and effective APR
/ 245 viewsThe difference between APR and effective APR More free lessons at: http://www.khanacademy.org/video?v=RuPMsK0mQC8

04:08
Basics of US income tax rate schedule
/ 247 viewsUnderstanding that a marginal tax rate does not apply to all of income More free lessons at: http://www.khanacademy.org/video?v=OGVJfcSckUs

11:41
Institutional roles in issuing and processing credit cards
/ 280 viewsThe institutions involved in processing your credit credit and how they relate to each other More free lessons at: http://www.khanacademy.org/video?v=IPxQQNyCxas

08:42
Introduction to bonds
/ 267 viewsWhat it means to buy a bond More free lessons at: http://www.khanacademy.org/video?v=QhM3_L4xYk

06:38
Introduction to compound interest
/ 224 viewsIntroduction to compound interest More free lessons at: http://www.khanacademy.org/video?v=Rm6UdfRs3gw

18:27
Introduction to mortgage loans
/ 234 viewsExplains mortgages. This will help you understand what you are doing when you are paying a mortgage. More free lessons at: http://www.khanacademy.org/video?v=IDHJCEKeHLc

09:39
Openended mutual funds
/ 219 viewsMutual fund basics More free lessons at: http://www.khanacademy.org/video?v=zqRxV9ICn4I

13:04
Personal bankruptcy  Chapters 7 and 13
/ 215 viewsWhat is bankruptcy? More free lessons at: http://www.khanacademy.org/video?v=H3tg4bH5JuY

13:16
Relationship between bond prices and interest rates
/ 245 viewsWhy bond prices move inversely to changes in interest rate More free lessons at: http://www.khanacademy.org/video?v=I7FDx4DPapw

16:30
Roth IRAs
/ 251 viewsOverview of what a Roth IRA is. More free lessons at: http://www.khanacademy.org/video?v=th06SCNNZ60

09:11
The rule of 72 for compound interest
/ 223 viewsUsing the rule of 72 to approximate how long it will take for an investment to compound More free lessons at: http://www.khanacademy.org/video?v=mecQpjQMXY

13:24
Traditional IRAs
/ 331 viewsOverview of a traditional IRA More free lessons at: http://www.khanacademy.org/video?v=UV8kgqk_DAY

09:47
Primer on the unemployment rate
/ 218 viewsUnderstanding how the headline unemployment rate (U3) is calculated More free lessons at: http://www.khanacademy.org/video?v=C9onjpQGpSg

13:47
What it means to buy a company's stock
/ 238 viewsWhat it means to buy a company's stock More free lessons at: http://www.khanacademy.org/video?v=98qfFzqDKR8

14:34
Health Care Costs in US vs Europe
/ 353 viewsA discussion about US health care costs More free lessons at: http://www.khanacademy.org/video?v=6YU9HVS2GT0

13:33
Conversation About Drug Pricing
/ 283 viewsDr. Lauwrence Baker talks to Sal about how drug prices are set More free lessons at: http://www.khanacademy.org/video?v=8tUn7yH99g

10:05
Blue Cross and Blue Shield
/ 356 viewsSal and Dr. Baker talk a bit about Blue Cross and Blue Shield More free lessons at: http://www.khanacademy.org/video?v=S9xdJgPWOw

09:09
Inflammation
/ 287 viewsDr. David Agus talks about inflammation (while Sal repeatedly misspells it with one "m") More free lessons at: http://www.khanacademy.org/video?v=GZ6I3T1RAnQ

12:36
Childhood Growth
/ 362 viewsSal talks with Dr. Laura Bachrach about childhood growth More free lessons at: http://www.khanacademy.org/video?v=gF0aAsi89Y

09:37
Intro to the Endocrine System
/ 342 viewsBasic overview of hormones and the endocrine system More free lessons at: http://www.khanacademy.org/video?v=f_Z1zsR9lFM

07:53
Stenosis, ischemia and heart failure
/ 411 viewsClarifying a bunch of medical terms around heart disease More free lessons at: http://www.khanacademy.org/video?v=3858MaULDdI

12:21
Heart Disease and Heart Attacks
/ 563 viewsBasics of heart disease, heart attacks, heart failure, angina, cardiac arrest. Special thanks to Edward J Perper, MD for help in clarifying certain aspects of this video. Licensed under CCBYSA More free lessons at: http://www.khanacademy.org/video?v=vYn

06:09
A1C Levels
/ 313 viewsWhy measuring Hemoglobin A1c levels is an indicator of blood sugar levels (and diabetes) More free lessons at: http://www.khanacademy.org/video?v=MOH33jFOwo

08:55
Blood Sugar Levels
/ 429 viewsNormal and elevated blood sugar levels before (preprandia) and after (postprandial) a meal More free lessons at: http://www.khanacademy.org/video?v=JSFiOF7xGfE

07:24
Glucose Insulin and Diabetes
/ 369 viewsThe basics of Type I and Type II diabetes More free lessons at: http://www.khanacademy.org/video?v=rPLjSY00JlE

04:13
Solving Logarithmic Equations
/ 227 viewsu18_l4_t1_we2 Solving Logarithmic Equations More free lessons at: http://www.khanacademy.org/video?v=Kv2iHde7Xgw Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

01:09
Calculator for Natural Logarithms
/ 238 viewsu18_l3_t1_we6 Calculator for Natural Logarithms More free lessons at: http://www.khanacademy.org/video?v=r0eFSS8CNQ Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

09:13
Graphing Natural Logarithm Function
/ 318 viewsu18_l3_t1_we2 Graphing Natural Logarithm Function More free lessons at: http://www.khanacademy.org/video?v=xmjy0TxgI8 Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

03:37
Natural Logarithm with a Calculator
/ 347 viewsu18_l3_t1_we1 Natural Logarithm with a Calculator More free lessons at: http://www.khanacademy.org/video?v=Dpo_GrMpNE Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

02:10
Using Multiple Logarithm Properties to Simplify
/ 256 viewsu18_l2_t2_we4 Using Multiple Logarithm Properties to Simplify More free lessons at: http://www.khanacademy.org/video?v=RhzXX5PbsuQ Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

04:49
Logarithm of a Power
/ 376 viewsu18_l2_t2_we3 Logarithm of a Power More free lessons at: http://www.khanacademy.org/video?v=Pb9V374iOas Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

04:39
Difference of Logarithms with Same Base
/ 243 viewsu18_l2_t2_we2 Difference of Logarithms with Same Base

05:04
Sum of Logarithms with Same Base
/ 216 viewsu18_l2_t2_we1 Sum of Logarithms with Same Base More free lessons at: http://www.khanacademy.org/video?v=pkGrXzakRFs Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

03:28
Solving Logarithmic Equations
/ 232 viewsu18_l2_t1_we4 Solving Logarithmic Equations More free lessons at: http://www.khanacademy.org/video?v=oqAYqT70EBQ Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

09:10
Graphing Logarithmic Functions
/ 212 viewsu18_l2_t1_we3 Graphing Logarithmic Functions More free lessons at: http://www.khanacademy.org/video?v=DuYgVVU_BwY Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

02:00
Logarithmic Equations 2
/ 215 viewsu18_l2_t1_we2 Logarithmic Equations 2 Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

01:27
Logarithmic Equations
/ 241 viewsu18_l2_t1_we1 Logarithmic Equations More free lessons at: http://www.khanacademy.org/video?v=fyshrv6YDVY Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

05:32
Graphing Exponential Functions
/ 216 viewsu18_l1_t1_we1 Graphing Exponential Functions More free lessons at: http://www.khanacademy.org/video?v=9SOSfRNCQZQ Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

06:18
Quotient of Functions
/ 224 viewsu17_l3_t1_we4 Quotient of functions and factoring by grouping More free lessons at: http://www.khanacademy.org/video?v=u9v_bakOIcU Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

03:00
Product of Functions
/ 223 viewsu17_l3_t1_we3 Product of Functions More free lessons at: http://www.khanacademy.org/video?v=JKvmAexeMgY Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

03:08
Difference of Functions
/ 229 viewsu17_l3_t1_we2 Difference of Functions More free lessons at: http://www.khanacademy.org/video?v=KvMyZY9upuA Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

02:33
Sum of Functions
/ 202 viewsu17_l3_t1_we1 Sum of Functions More free lessons at: http://www.khanacademy.org/video?v=n34dqyVCXs4 Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

01:47
Domain of a Radical Function
/ 338 viewsu17_l2_t3_we2 Domain of a Radical Function More free lessons at: http://www.khanacademy.org/video?v=4h54s7BBPpA Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

08:07
Domain and Range of a Function Given a Formula
/ 317 viewsu17_l2_t3_we1 Domain and Range of a Function Given a Formula More free lessons at: http://www.khanacademy.org/video?v=za0QJRZyQ4 Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

10:17
Graphing Radical Functions
/ 225 viewsu17_l2_t2_we3 Graphing Radical Functions More free lessons at: http://www.khanacademy.org/video?v=Mi6OJ4TAufY Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

05:36
Graphing a Basic Function
/ 243 viewsu17_l2_t2_we1 Graphing a Basic Function More free lessons at: http://www.khanacademy.org/video?v=2dUHLHeyTY Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

05:08
Evaluating Functions
/ 239 viewsu17_l2_t1_we1 Evaluating Functions More free lessons at: http://www.khanacademy.org/video?v=E9YEUQR9NAU Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

04:07
Graphical Relations and Functions
/ 311 viewsu17_l1_t1_we3 Graphical Relations and Functions More free lessons at: http://www.khanacademy.org/video?v=qGmJ4F3b5W8 Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

06:57
Relations and Functions
/ 189 viewsu17_l1_t1_we2 Relations and Functions More free lessons at: http://www.khanacademy.org/video?v=Uz0MtFlLDk Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

02:43
Domain and Range of a Relation
/ 249 viewsu17_l1_t1_we1 Domain and Range of a Relation More free lessons at: http://www.khanacademy.org/video?v=g3LrOw1JMi8 Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

05:53
Application Problem with Quadratic Formula
/ 212 viewsu16_l5_t2_we5 Application Problem with Quadratic Formula More free lessons at: http://www.khanacademy.org/video?v=OZtqz_xw0SQ Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

04:37
Discriminant for Types of Solutions for a Quadratic
/ 395 viewsu16_l5_t2_we4 Discriminant for Types of Solutions for a Quadratic More free lessons at: http://www.khanacademy.org/video?v=1213qW5k55I Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

10:15
Complex Roots from the Quadratic Formula
/ 216 viewsu16_l5_t2_we3 Complex Roots from the Quadratic Formula More free lessons at: http://www.khanacademy.org/video?v=dnjK4DPqh0k Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

04:51
Applying the Quadratic Formula
/ 218 viewsu16_l5_t2_we2 Applying the Quadratic Formula More free lessons at: http://www.khanacademy.org/video?v=_E3gx_yQhHQ Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

02:22
Quadratic Equations in Standard Form
/ 239 viewsu16_l5_t2_we1 Quadratic Equations in Standard Form More free lessons at: http://www.khanacademy.org/video?v=ty4Ohya4hdE Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

05:44
Completing the Square to Solve Quadratic Equations
/ 373 viewsu16_l5_t1_we3 Completing the Square to Solve Quadratic Equations More free lessons at: http://www.khanacademy.org/video?v=TV5kDqiJ1Os Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

03:28
Completing Perfect Square Trinomials
/ 312 viewsu16_l5_t1_we2 Completing Perfect Square Trinomials Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

02:18
Simple Quadratic Equation
/ 201 viewsu16_l5_t1_we1 Simple Quadratic Equation More free lessons at: http://www.khanacademy.org/video?v=RweAgQwLdMs Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

04:58
Dividing Complex Numbers
/ 218 viewsu16_l4_t2_we5 Dividing Complex Numbers More free lessons at: http://www.khanacademy.org/video?v=Z8j5RDOibV4 Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

04:01
Complex Conjugates Example
/ 213 viewsu16_l4_t2_we4 Complex Conjugates More free lessons at: http://www.khanacademy.org/video?v=dbxJ6LD0344 Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

05:32
Multiplying Complex Numbers
/ 280 viewsu16_l4_t2_we3 Multiplying Complex Numbers More free lessons at: http://www.khanacademy.org/video?v=cWn6g8Qqvs4 Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

01:53
Subtracting Complex Numbers
/ 282 viewsu16_l4_t2_we2 Subtracting Complex Numbers More free lessons at: http://www.khanacademy.org/video?v=tvXRaZbIjO8 Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

01:12
Adding Complex Numbers
/ 292 viewsu16_l4_t2_we1 Adding Complex Numbers More free lessons at: http://www.khanacademy.org/video?v=SfbjqVyQljk Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

04:04
Imaginary Roots of Negative Numbers
/ 247 viewsu16_l4_t1_we2 Imaginary Roots of Negative Numbers More free lessons at: http://www.khanacademy.org/video?v=s03qez6JMA Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

02:21
Complex Numbers
/ 243 viewsu16_l4_t1_we1 Complex Numbers Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

03:24
Radical Equation Application Problem
/ 277 viewsu16_l3_t1_we3 Radical Equation Application Problem

10:57
Extraneous Solutions for Radical Equations
/ 231 viewsu16_l3_t1_we2 Extraneous Solutions for Radical Equations

03:11
Solving Radical Equations
/ 207 viewsu16_l3_t1_we1 Solving Radical Equations More free lessons at: http://www.khanacademy.org/video?v=pFFoAGIEyJc Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

04:01
Rationalizing Denominators with Conjugates
/ 176 viewsu16_l2_t4_we2 Rationalizing Denominators with Conjugates

04:58
Rationalizing Denominators of Expressions
/ 199 viewsu16_l2_t4_we1 Rationalizing Denominators of Expressions More free lessons at: http://www.khanacademy.org/video?v=Z3db5itCIiQ Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

06:04
Multiplying Binomials with Radicals
/ 240 viewsu16_l2_t3_we1 Multiplying Binomials with Radicals More free lessons at: http://www.khanacademy.org/video?v=yAH3722GrP8 Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

05:46
Subtracting and Simplifying Radicals
/ 242 viewsu16_l2_t2_we2 Subtracting and Simplifying Radicals More free lessons at: http://www.khanacademy.org/video?v=qH4IQfDD1Nw Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

04:41
Adding and Simplifying Radicals
/ 199 viewsu16_l2_t2_we1 Adding and Simplifying Radicals More free lessons at: http://www.khanacademy.org/video?v=egNq4tSfi1I Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

03:07
Multiply and Simplify a Radical Expression 2
/ 230 viewsu16_l2_t1_we2 Multiply and Simply a Radical Expression More free lessons at: http://www.khanacademy.org/video?v=sBvRJUwXJPo Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

04:25
Multiply and Simplify a Radical Expression 1
/ 197 viewsu16_l2_t1_we1 Multiply and Simply a Radical Expression More free lessons at: http://www.khanacademy.org/video?v=GEeKOeGHddY Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

03:25
More Rational Exponents and Exponent Laws
/ 320 viewsu16_l1_t3_we4 More Rational Exponents and Exponent Laws More free lessons at: http://www.khanacademy.org/video?v=rco7DMcyoE Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

02:16
Rational Exponents and Exponent Laws
/ 318 viewsu16_l1_t3_we3 Rational Exponents and Exponent Laws More free lessons at: http://www.khanacademy.org/video?v=NuccqpiUHrk Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

02:24
Radical Equivalent to Rational Exponents 2
/ 241 viewsu16_l1_t3_we2 Radical Equivalent to Rational Exponents 2 More free lessons at: http://www.khanacademy.org/video?v=zlRKO21qEpQ Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

02:57
Radical Equivalent to Rational Exponents
/ 281 viewsu16_l1_t3_we1 Radical Equivalent to Rational Exponents More free lessons at: http://www.khanacademy.org/video?v=jO4wOQQiVZg Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

05:25
Simplifying Cube Roots
/ 221 viewsu16_l1_t2_we3 Simplifying Cube Roots More free lessons at: http://www.khanacademy.org/video?v=cwtvEdEoVs Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

04:18
Finding Cube Roots
/ 242 viewsu16_l1_t2_we2 Finding Cube Roots More free lessons at: http://www.khanacademy.org/video?v=DKh16Th8x6o Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education

04:16
Simplifying Square Roots Comment Response
/ 254 viewsThinking about the domain of the expression to determine if we need the absolute value sign More free lessons at: http://www.khanacademy.org/video?v=qFFhdLlX220 Content provided by TheNROCproject.org  (c) Monterey Institute for Technology and Education