Recently added videos

02:40
Dividing Whole Numbers and Applications 2

559 views / 0 likes - added 9 years ago

U01_L3_T2_we2 Dividing Whole Numbers and Applications 2
02:28
Dividing Whole Numbers and Applications 1

514 views / 0 likes - added 9 years ago

U01_L3_T2_we1 Dividing Whole Numbers and Applications 1 More free lessons at: http://www.khanacademy.org/video?v=4I9iibPLdBw Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
02:39
Multiplying Whole Numbers and Applications 6

606 views / 0 likes - added 9 years ago

U01_L3_T1_we6 Multiplying Whole Numbers and Applications 6 More free lessons at: http://www.khanacademy.org/video?v=bS6EmYzpou4 Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
02:32
Multiplying Whole Numbers and Applications 5

700 views / 0 likes - added 9 years ago

U01_L3_T1_we5 Multiplying Whole Numbers and Applications 5
01:51
Multiplying Whole Numbers and Applications 4

607 views / 0 likes - added 9 years ago

U01_L3_T1_we4 Multiplying Whole Numbers and Applications 4 More free lessons at: http://www.khanacademy.org/video?v=tx2Niw7aJJ8 Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
03:24
Multiplying Whole Numbers and Applications 3

557 views / 0 likes - added 9 years ago

U01_L3_T1_we3 Multiplying Whole Numbers and Applications 3
03:18
Multiplying Whole Numbers and Applications 2

552 views / 0 likes - added 9 years ago

U01_L3_T1_we2 Multiplying Whole Numbers and Applications 2 More free lessons at: http://www.khanacademy.org/video?v=0WUXQNjdRvM Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
03:03
Multiplying Whole Numbers and Applications 1

574 views / 0 likes - added 9 years ago

U01_L3_T1_we1 Multiplying Whole Numbers and Applications 1 More free lessons at: http://www.khanacademy.org/video?v=Yw3EoxC_GXU Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
02:16
Rounding to Estimate Sums 2

446 views / 0 likes - added 9 years ago

U01_L2_T3_we3 Rounding to Estimate Sums 2
02:41
Rounding to Estimate Sums

482 views / 0 likes - added 9 years ago

U01_L2_T3_we2 Rounding to Estimate Sums
03:29
Rounding to Estimate Differences

509 views / 0 likes - added 9 years ago

U01_L2_T3_we1 Rounding to Estimate Differences
05:09
Subtraction Word Problem

560 views / 0 likes - added 9 years ago

u01_l2_t2_we3 Subtraction Word Problem Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
07:16
Subtraction with Borrowing or Regrouping

555 views / 0 likes - added 9 years ago

u01_l2_t2_we2 Subtraction with Borrowing or Regrouping
02:54
Subtracting Whole Numbers

437 views / 0 likes - added 9 years ago

u01_l2_t2_we1 Subtracting Whole Numbers More free lessons at: http://www.khanacademy.org/video?v=sAw71J2kYJE Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
02:13
Adding Whole Numbers and Applications 4

624 views / 0 likes - added 9 years ago

U01_L2_T1_we4 Adding Whole Numbers and Applications 3
02:01
Adding Whole Numbers and Applications 3

501 views / 0 likes - added 9 years ago

U01_L2_T1_we3 Adding Whole Numbers and Applications 3
02:38
Adding Whole Numbers and Applications 2

543 views / 0 likes - added 9 years ago

U01_L2_T1_we2 Adding Whole Numbers and Applications 2
01:32
Adding Whole Numbers and Applications 1

539 views / 0 likes - added 9 years ago

U01_L2_T1_we1 Adding Whole Numbers and Applications 1 More free lessons at: http://www.khanacademy.org/video?v=b22tMEc6Kko Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
01:58
Comparing Whole Numbers 3

502 views / 0 likes - added 9 years ago

U01_L1_T3_we3 Comparing Whole Numbers 3
01:24
Comparing Whole Numbers 2

512 views / 0 likes - added 9 years ago

U01_L1_T3_we2 Comparing Whole Numbers 2
02:05 Popular
Comparing Whole Numbers

839 views / 1 likes - added 9 years ago

U01_L1_T3_we1 Comparing Whole Numbers
01:04
Rounding Whole Numbers 3

461 views / 0 likes - added 9 years ago

U01_L1_T2_we3 Rounding Whole Numbers 3 More free lessons at: http://www.khanacademy.org/video?v=3jBfLaLrk6I Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
02:28
Rounding Whole Numbers 2

603 views / 0 likes - added 9 years ago

U01_L1_T2_we2 Rounding Whole Numbers 2 More free lessons at: http://www.khanacademy.org/video?v=fh8gkPW_6g4 Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
04:23
Rounding Whole Numbers 1

494 views / 0 likes - added 9 years ago

U01_L1_T2_we1 Rounding Whole Numbers 1 More free lessons at: http://www.khanacademy.org/video?v=_qzs1zozTBo Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
05:20
Place Value 3

504 views / 0 likes - added 9 years ago

U01_L1_T1_we3 Place Value 3 More free lessons at: http://www.khanacademy.org/video?v=iK0y39rjBgQ Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
04:09
Place Value 2

538 views / 0 likes - added 9 years ago

U01_L1_T1_we2 Place Value 2 More free lessons at: http://www.khanacademy.org/video?v=wd4cRAoBOiE Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
02:25
Place Value 1

579 views / 0 likes - added 9 years ago

U01_L1_T1_we1 Place Value 1 More free lessons at: http://www.khanacademy.org/video?v=jxA8MffVmPs Content provided by TheNROCproject.org - (c) Monterey Institute for Technology and Education
10:30
Probability (part 1)

521 views / 0 likes - added 9 years ago

What probability is. More free lessons at: http://www.khanacademy.org/video?v=3ER8OkqBdpE
09:23
Ordering numeric expressions

467 views / 0 likes - added 9 years ago

Ordering numbers expressed as decimals, fractions, and percentages More free lessons at: http://www.khanacademy.org/video?v=Llt-KkHugRQ
11:30
Ordering Numeric Expressions

578 views / 0 likes - added 9 years ago

Converting percentages and fractions to decimals to order numbers
06:45
Algebra: Linear Equations 3

461 views / 0 likes - added 9 years ago

Linear equations with multiple variable and constant terms More free lessons at: http://www.khanacademy.org/video?v=Zn-GbH2S0Dk
06:07
Algebra: Linear Equations 2

483 views / 0 likes - added 9 years ago

solving equations of the form AX+B=C More free lessons at: http://www.khanacademy.org/video?v=DopnmxeMt-s
07:28
Algebra: Linear Equations 1

536 views / 0 likes - added 9 years ago

equations of the form AX=B More free lessons at: http://www.khanacademy.org/video?v=bAerID24QJ0
04:16
China keeps peg but diversifies holdings

541 views / 0 likes - added 9 years ago

China keeps peg but diversifies holdings More free lessons at: http://www.khanacademy.org/video?v=4aNoZjAhSr8
12:24
Debt Loops Rationale and Effects

609 views / 0 likes - added 9 years ago

Positive and negative effects of China's devaluing of their currency More free lessons at: http://www.khanacademy.org/video?v=XBI7DqttyOQ
15:27 Popular
American-Chinese Debt Loop

765 views / 0 likes - added 9 years ago

How the Chinese buying of American debt leads to lower interest rates More free lessons at: http://www.khanacademy.org/video?v=m5xu4r0szaA
12:10 Popular
Chinese Central Bank Buying Treasuries

711 views / 0 likes - added 9 years ago

Chinese Central Bank Buying Treasuries More free lessons at: http://www.khanacademy.org/video?v=MN4SWiEEqKo
06:52 Popular
Pegging the Yuan

932 views / 0 likes - added 9 years ago

How the Chinese Central Bank could peg the Yuan to the dollar by printing Yuan and buying dollars (building up a dollar reserve) More free lessons at: http://www.khanacademy.org/video?v=S-9iY1OgbDE
10:06
Currency Effect on Trade Review

587 views / 0 likes - added 9 years ago

Currency Effect on Trade Review More free lessons at: http://www.khanacademy.org/video?v=Ysk1ySejuCQ
14:20
Currency Effect on Trade

655 views / 0 likes - added 9 years ago

Currency Effect on Trade More free lessons at: http://www.khanacademy.org/video?v=5HVCFrXQ9pw
12:04
Currency Exchange Introduction

580 views / 0 likes - added 9 years ago

Introduction to how exchange rates can fluctuate More free lessons at: http://www.khanacademy.org/video?v=itoNb1lb5hY
11:07
Random Predictions for 2060

445 views / 0 likes - added 9 years ago

Sal's random predictions for the year 2060 More free lessons at: http://www.khanacademy.org/video?v=E4rbS0oxg30
13:41
Energy Inputs for Tilling a Hectare of Land

558 views / 0 likes - added 9 years ago

Thinking about energy consumption for tilling land More free lessons at: http://www.khanacademy.org/video?v=5I9dH5im24U
13:00 Popular
Land Productivity Limiting Human Population

781 views / 0 likes - added 9 years ago

Thinking about how we get Calories from the land limits human population densities More free lessons at: http://www.khanacademy.org/video?v=xM8szz4VB28
13:17
Collective Learning

562 views / 0 likes - added 9 years ago

How symbolic language drives collective learning and how this is one of the truly differentiating aspects of human beings relative to the rest of the animal kingdom More free lessons at: http://www.khanacademy.org/video?v=NqR_dtZu4Mo
09:54
Chronometric Revolution

574 views / 0 likes - added 9 years ago

Discussion of the relatively recent changes in our ability as a species to shine light on our deep past More free lessons at: http://www.khanacademy.org/video?v=5mNTvtjDnP8
11:07
K-Ar Dating Calculation

589 views / 0 likes - added 9 years ago

Working through a calculation for K-Ar dating (good to have some prior experience with e and logarithms) More free lessons at: http://www.khanacademy.org/video?v=iLFcSfzrlMk
10:35
Potassium-Argon (K-Ar) Dating

634 views / 0 likes - added 9 years ago

How K-Ar dating can be used to date very old volcanic rock and the things that might be buried in between More free lessons at: http://www.khanacademy.org/video?v=NMZ5kJEviD0
04:15
Carbon 14 Dating 2

601 views / 0 likes - added 9 years ago

Carbon 14 Dating 2 More free lessons at: http://www.khanacademy.org/video?v=4YUtnod-YuE
07:07
Apsidal Precession (Perihelion Precession) and Milankovitch Cycles

514 views / 0 likes - added 9 years ago

Apsidal Precession (Perihelion Precession) More free lessons at: http://www.khanacademy.org/video?v=m6lMGoZTJnc
02:06
What Causes Precession and Other Orbital Changes

423 views / 0 likes - added 9 years ago

What causes precession and other orbital changes More free lessons at: http://www.khanacademy.org/video?v=nL6LMX8-bPY
12:04
Precession Causing Perihelion to Happen Later

568 views / 0 likes - added 9 years ago

Clarifying the effect of axial precession on the calendar and the date of perihelion and aphelion More free lessons at: http://www.khanacademy.org/video?v=2o-Sef6wllg
12:57
Milankovitch Cycles Precession and Obliquity

519 views / 0 likes - added 9 years ago

How changes in Earth's rotation can effect Earth's seasons and climate More free lessons at: http://www.khanacademy.org/video?v=ZD8THEz18gc
04:39
Seasons Aren't Dictated by Closeness to Sun

547 views / 0 likes - added 9 years ago

Why our closeness to the sun does not dictate the seasons More free lessons at: http://www.khanacademy.org/video?v=SJUd5du0T08
13:04
Development of Agriculture and Writing

597 views / 0 likes - added 9 years ago

The Paleolithic and Neolithic eras of the Stone Age. More free lessons at: http://www.khanacademy.org/video?v=iU58AIjh3YA
04:12
Correction Calendar Notation

569 views / 0 likes - added 9 years ago

Correcting the time difference calculation by taking into account that there is no year 0 More free lessons at: http://www.khanacademy.org/video?v=N06Jy-gQog8
09:41
Understanding Calendar Notation

641 views / 0 likes - added 9 years ago

Difference between BC, BCE, AD and CE. A little bit about the birth of Jesus as well. More free lessons at: http://www.khanacademy.org/video?v=EKKe7DBZVhI
05:10
Detectable Civilizations in our Galaxy 5

496 views / 0 likes - added 9 years ago

More reasons why we haven't detected anything yet. More free lessons at: http://www.khanacademy.org/video?v=xL9ejqb53ms
06:16
Detectable Civilizations in our Galaxy 4

533 views / 0 likes - added 9 years ago

Taking a shot at estimating the number of detectable civilizations More free lessons at: http://www.khanacademy.org/video?v=T5DGZIsfK-0
07:18
Detectable Civilizations in our Galaxy 3

572 views / 0 likes - added 9 years ago

Reconciling with the traditional Drake Equation More free lessons at: http://www.khanacademy.org/video?v=LRmwUsxNSL0
08:53
Detectable Civilizations in our Galaxy 2

541 views / 0 likes - added 9 years ago

Why do we even care about the Drake Equation. Thinking about the fraction of a planet's life when a civilization might be detectable. More free lessons at: http://www.khanacademy.org/video?v=jN03g05TSWM
13:03
Detectable Civilizations in our Galaxy 1

476 views / 0 likes - added 9 years ago

A framework for thinking about how many detectable civilizations are out there. More free lessons at: http://www.khanacademy.org/video?v=YYEgq1bweN4
11:03
Scale of the Large

557 views / 0 likes - added 9 years ago

Attempting to comprehend the scale of the large More free lessons at: http://www.khanacademy.org/video?v=5FEjrStgcF8
05:50
How we know about the Earth's core

583 views / 0 likes - added 9 years ago

S-wave shadow and P-wave detection patterns give us information about the core More free lessons at: http://www.khanacademy.org/video?v=KL0i1RSnpfI
06:13
The Mohorovicic Seismic Discontinuity

647 views / 0 likes - added 9 years ago

The Mohorovicic Seismic Discontinuity- boundary between crust and mantle (or Moho) More free lessons at: http://www.khanacademy.org/video?v=yAQSucmHrAk
09:22 Popular $Refraction of Seismic Waves$
Refraction of Seismic Waves

731 views / 1 likes - added 9 years ago

Refraction of Seismic Waves More free lessons at: http://www.khanacademy.org/video?v=UNZ171fDja4
04:15
Why S-Waves Only Travel in Solids

573 views / 0 likes - added 9 years ago

Why S-Waves Only Travel in Solids More free lessons at: http://www.khanacademy.org/video?v=BTWLwoaNeBA
08:38 Popular
Seismic Waves

1,173 views / 0 likes - added 9 years ago

S-waves and P-waves More free lessons at: http://www.khanacademy.org/video?v=NhioAAdYDJM
11:50 Popular
Compositional and Mechanical Layers of the Earth

843 views / 2 likes - added 9 years ago

Crust, mantle, core, lithosphere, asthenosphere, mesosphere, outer core, inner core More free lessons at: http://www.khanacademy.org/video?v=hHteUIS0OFY
08:01
Hawaiian Islands Formation

654 views / 0 likes - added 9 years ago

Hawaiian Islands formed by stationary hot spot under Pacific plate More free lessons at: http://www.khanacademy.org/video?v=D1eibbfAEVk
06:03
Plates Moving Due to Convection in Mantle

535 views / 0 likes - added 9 years ago

Plates Moving Due to Convection in Mantle More free lessons at: http://www.khanacademy.org/video?v=f8GK2oEN-uI
06:04 Popular
Plate Tectonics-- Geological features of Convergent Plate Boundaries

755 views / 1 likes - added 9 years ago

Geological features of Convergent Plate Boundaries More free lessons at: http://www.khanacademy.org/video?v=Y0eWnOZpSpQ
11:58 Popular
Plate Tectonics -- Geological Features of Divergent Plate Boundaries

1,513 views / 0 likes - added 9 years ago

Plate Tectonics -- Geological Features of Divergent Plate Boundaries More free lessons at: http://www.khanacademy.org/video?v=FK1s1-OJ5BE
09:33
Structure of the Earth

553 views / 0 likes - added 9 years ago

Structure of the Earth - crust, mantle, core More free lessons at: http://www.khanacademy.org/video?v=4AxZ-6MOznY
08:00 Popular
Plate Tectonics-- Difference between crust and lithosphere

714 views / 0 likes - added 9 years ago

Plate Tectonics Introduction and Difference between crust and lithosphere More free lessons at: http://www.khanacademy.org/video?v=f2BWsPVN7c4
05:35 Popular
First living things on land clarification

715 views / 0 likes - added 9 years ago

First living things on land clarification (This video copyrighted under Create Commons Attribution and Share-Alike CC-BY-SA license) More free lessons at: http://www.khanacademy.org/video?v=3gUE_P9T-Wk
10:28
Biodiversity Flourishes in Phanerozoic Eon

433 views / 0 likes - added 9 years ago

Cambrian explosion and biodiversity in the Phanerozoic Eon More free lessons at: http://www.khanacademy.org/video?v=MS7x2hDEhrw
09:56
Ozone Layer and Eukaryotes Show Up in the Proterozoic Eon

684 views / 0 likes - added 9 years ago

Ozone Layer and Eukaryotes Show Up in the Proterozoic Eon. Great Oxygenation Event (Oxygen Catastrophe) More free lessons at: http://www.khanacademy.org/video?v=E1P79uFLCMc
10:26
Beginnings of Life

661 views / 0 likes - added 9 years ago

Life and photosynthesis start to thrive in the Archean Eon More free lessons at: http://www.khanacademy.org/video?v=nYFuxTXDj90
01:46
Quasar Correction

651 views / 0 likes - added 9 years ago

Quasar Correction More free lessons at: http://www.khanacademy.org/video?v=PX_XSnVWlNc
09:15
Quasars

397 views / 0 likes - added 9 years ago

Quasars More free lessons at: http://www.khanacademy.org/video?v=4LmIyMyAuN0
09:29
Supermassive Black Holes

547 views / 1 likes - added 9 years ago

Supermassive Black Holes More free lessons at: http://www.khanacademy.org/video?v=DxkkAHnqlpY
07:10
Why Cepheids Pulsate

420 views / 0 likes - added 9 years ago

Why Cepheids Pulsate More free lessons at: http://www.khanacademy.org/video?v=X_3QAB3o4Vw
09:23
Cepheid Variables 1

567 views / 0 likes - added 9 years ago

Cepheid Variables 1 More free lessons at: http://www.khanacademy.org/video?v=BWs-ONRDDG4
01:32
Supernova clarification

538 views / 0 likes - added 9 years ago

Supernova clarification More free lessons at: http://www.khanacademy.org/video?v=QMv4kxATfzs
11:58
Supernova (Supernovae)

593 views / 0 likes - added 9 years ago

Supernova (Supernovae) More free lessons at: http://www.khanacademy.org/video?v=qOwCpnQsDLM
06:41
Lifecycle of Massive Stars

668 views / 0 likes - added 9 years ago

Lifecycle of Massive Stars More free lessons at: http://www.khanacademy.org/video?v=UhIwMAhZpCo
07:34
Parsec Definition

474 views / 0 likes - added 9 years ago

Parsec Definition More free lessons at: http://www.khanacademy.org/video?v=6zV3JEjLoyE
02:22
Stellar Parallax Clarification

478 views / 0 likes - added 9 years ago

Stellar Parallax Clarification More free lessons at: http://www.khanacademy.org/video?v=6FP-hLuAlr4
11:40
Stellar Distance Using Parallax

472 views / 0 likes - added 9 years ago

Stellar Distance Using Parallax More free lessons at: http://www.khanacademy.org/video?v=lVadjWOjvV8
09:26
Stellar Parallax

449 views / 0 likes - added 9 years ago

Another version of the stellar parallax introduction More free lessons at: http://www.khanacademy.org/video?v=omvNINaRdxg
07:22
Parallax in Observing Stars

528 views / 0 likes - added 9 years ago

Parallax in Observing Stars More free lessons at: http://www.khanacademy.org/video?v=ETzUpoqZIHY
07:04
Star Field and Nebula Images

555 views / 0 likes - added 9 years ago

Star Field and Nebula Images More free lessons at: http://www.khanacademy.org/video?v=w3IKEa_GOYs
08:58
A Universe Smaller than the Observable

471 views / 0 likes - added 9 years ago

A Universe Smaller than the Observable More free lessons at: http://www.khanacademy.org/video?v=0w9R_foNLrg
12:54
White and Black Dwarfs

537 views / 1 likes - added 9 years ago

White and Black Dwarfs More free lessons at: http://www.khanacademy.org/video?v=EdYyuUUY-nc
11:30
Becoming a Red Giant

562 views / 1 likes - added 9 years ago

Becoming a Red Giant More free lessons at: http://www.khanacademy.org/video?v=kJSOqlcFpJw
07:58
Birth of Stars

658 views / 2 likes - added 9 years ago

Birth of Stars More free lessons at: http://www.khanacademy.org/video?v=i-NNWI8Ccas
10:30
Four Fundamental Forces

455 views / 0 likes - added 9 years ago

Gravity, Weak, Electromagnetic and Strong More free lessons at: http://www.khanacademy.org/video?v=FEF6PxWOvsk
06:18
Cosmological Time Scale 2

507 views / 0 likes - added 9 years ago

Cosmological Time Scale 2 More free lessons at: http://www.khanacademy.org/video?v=LO7-3MpWijU
07:07
Cosmological Time Scale 1

568 views / 0 likes - added 9 years ago

Cosmological Time Scale 1 More free lessons at: http://www.khanacademy.org/video?v=DRtLXagrMHw
10:16
Cosmic Background Radiation 2

573 views / 0 likes - added 9 years ago

Cosmic Background Radiation 2 - Redshift of the Cosmic Background Radiation More free lessons at: http://www.khanacademy.org/video?v=06z7Q8TWPyU
11:36
Cosmic Background Radiation

517 views / 0 likes - added 9 years ago

Cosmic Background Radiation More free lessons at: http://www.khanacademy.org/video?v=sxbPwl_KRuA
10:04
Red Shift

497 views / 0 likes - added 9 years ago

Red Shift More free lessons at: http://www.khanacademy.org/video?v=mx2M_ZKXM_c
02:15
(Correction) Radius of Observable Universe

486 views / 0 likes - added 9 years ago

(Correction) Radius of Observable Universe More free lessons at: http://www.khanacademy.org/video?v=b6VQv76BQDs