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  • Khan, Salman
Adding and Subtracting Fractions
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Kahn Academy video - How to add and subtract fractions with like and unlike denominators.

Subject:
Education
Mathematics
Algebra
Material Type:
Interactive
Teaching/Learning Strategy
Provider:
Florida Center for Research in Science, Technology, Engineering, and Mathematics
Provider Set:
iCPALMS: A Standards-based K-12 Resources and Tools Pathway
Author:
Salman Khan
Date Added:
03/28/2011
Adding vectors algebraically & graphically
Rating

To add the vectors (x₁,y₁) and (x₂,y₂), we add the corresponding components from each vector: (x₁+x₂,y₁+y₂). Here's a concrete example: the sum of (2,4) and (1,5) is (2+1,4+5), which is (3,9). There's also a nice graphical way to add vectors, and the two ways will always result in the same vector.​​

Subject:
Algebra
Material Type:
Lesson
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Salman Khan
Date Added:
02/07/2018
Arithmetic Operations: Adding Decimals Example 1
Conditions of Use:
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You get the general idea of decimal is and what the digits in different places represent (place value). Now you're ready to do something with the decimals. Adding and subtracting is a good place to start. This will allow you to add your family's expenses to figure out if your little brother is laundering money (perhaps literally). Have fun! Common Core Standard: 5.NBT.B.7

Subject:
Numbers and Operations
Material Type:
Activity/Lab
Homework/Assignment
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Khan
Salman
Date Added:
06/25/2014
Arithmetic Operations: Adding Decimals Example 2
Conditions of Use:
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Rating

You get the general idea of decimal is and what the digits in different places represent (place value). Now you're ready to do something with the decimals. Adding and subtracting is a good place to start. This will allow you to add your family's expenses to figure out if your little brother is laundering money (perhaps literally). Have fun! Common Core Standard: 5.NBT.B.7

Subject:
Numbers and Operations
Material Type:
Activity/Lab
Homework/Assignment
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Khan
Salman
Date Added:
06/25/2014
Arithmetic Operations: Adding Decimals Example 3
Conditions of Use:
Remix and Share
Rating

You get the general idea of decimal is and what the digits in different places represent (place value). Now you're ready to do something with the decimals. Adding and subtracting is a good place to start. This will allow you to add your family's expenses to figure out if your little brother is laundering money (perhaps literally). Have fun! Common Core Standard: 5.NBT.B.7

Subject:
Numbers and Operations
Material Type:
Activity/Lab
Homework/Assignment
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Khan
Salman
Date Added:
06/25/2014
Arithmetic Operations: Multiplying Decimals 1
Conditions of Use:
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The real world is seldom about whole numbers. If you precisely measure anything, you're likely to get a decimal. If you don't know how to multiply these decimals, then you won't be able to do all the powerful things that multiplication can do in the real world (figure out your commission as a robot possum salesperson, determining how much shag carpet you need for your secret lair, etc.). Common Core Standards: 5.NBT.B.5, 5.NBT.B.7

Subject:
Numbers and Operations
Material Type:
Activity/Lab
Homework/Assignment
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Khan
Salman
Date Added:
06/25/2014
Arithmetic Operations: Multiplying Decimals 2
Conditions of Use:
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Rating

The real world is seldom about whole numbers. If you precisely measure anything, you're likely to get a decimal. If you don't know how to multiply these decimals, then you won't be able to do all the powerful things that multiplication can do in the real world (figure out your commission as a robot possum salesperson, determining how much shag carpet you need for your secret lair, etc.). Common Core Standards: 5.NBT.B.5, 5.NBT.B.7

Subject:
Numbers and Operations
Material Type:
Activity/Lab
Homework/Assignment
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Khan
Salman
Date Added:
06/25/2014
Arithmetic Operations: Multiplying Decimals 3
Conditions of Use:
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Rating

The real world is seldom about whole numbers. If you precisely measure anything, you're likely to get a decimal. If you don't know how to multiply these decimals, then you won't be able to do all the powerful things that multiplication can do in the real world (figure out your commission as a robot possum salesperson, determining how much shag carpet you need for your secret lair, etc.). Common Core Standards: 5.NBT.B.5, 5.NBT.B.7

Subject:
Numbers and Operations
Material Type:
Activity/Lab
Homework/Assignment
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Khan
Salman
Date Added:
06/25/2014
Arithmetic Operations: Multiplying Decimals 4
Conditions of Use:
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Rating

The real world is seldom about whole numbers. If you precisely measure anything, you're likely to get a decimal. If you don't know how to multiply these decimals, then you won't be able to do all the powerful things that multiplication can do in the real world (figure out your commission as a robot possum salesperson, determining how much shag carpet you need for your secret lair, etc.). Common Core Standards: 5.NBT.B.5, 5.NBT.B.7

Subject:
Numbers and Operations
Material Type:
Activity/Lab
Homework/Assignment
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Khan
Salman
Date Added:
06/25/2014
Arithmetic Operations: Multiplying Decimals 5
Conditions of Use:
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Rating

The real world is seldom about whole numbers. If you precisely measure anything, you're likely to get a decimal. If you don't know how to multiply these decimals, then you won't be able to do all the powerful things that multiplication can do in the real world (figure out your commission as a robot possum salesperson, determining how much shag carpet you need for your secret lair, etc.). Common Core Standards: 5.NBT.B.5, 5.NBT.B.7

Subject:
Numbers and Operations
Material Type:
Activity/Lab
Homework/Assignment
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Khan
Salman
Date Added:
06/25/2014
Arithmetic Operations: Multiplying Decimals 6
Conditions of Use:
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Rating

The real world is seldom about whole numbers. If you precisely measure anything, you're likely to get a decimal. If you don't know how to multiply these decimals, then you won't be able to do all the powerful things that multiplication can do in the real world (figure out your commission as a robot possum salesperson, determining how much shag carpet you need for your secret lair, etc.). Common Core Standards: 5.NBT.B.5, 5.NBT.B.7

Subject:
Numbers and Operations
Material Type:
Activity/Lab
Homework/Assignment
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Khan
Salman
Date Added:
06/25/2014
Arithmetic Operations: Subtracting Decimals Example 1
Conditions of Use:
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Rating

Anything you can do with whole numbers, you can do with decimals. Subtraction is no exception. In this tutorial, you'll get some good practice subtracting decimals! Common Core Standard: 5.NBT.B.7

Subject:
Numbers and Operations
Material Type:
Activity/Lab
Homework/Assignment
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Khan
Salman
Date Added:
06/25/2014
Arithmetic Operations: Subtracting Decimals Example 2
Conditions of Use:
Remix and Share
Rating

Anything you can do with whole numbers, you can do with decimals. Subtraction is no exception. In this tutorial, you'll get some good practice subtracting decimals! Common Core Standard: 5.NBT.B.7

Subject:
Numbers and Operations
Material Type:
Activity/Lab
Homework/Assignment
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Khan
Salman
Date Added:
06/25/2014
Banking, Money, Finance: Analysis of the Federal Reserve Balance Sheet as of February 2007
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This lesson provides an analysis of the federal reserve balance sheet as of February 2007. [Banking, Money, Finance playlist: Lesson 21 of 24]

Subject:
Business and Communication
Finance
Economics
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Khan, Salman
Date Added:
01/17/2012
Banking, Money, Finance: Federal Funds Rate
Conditions of Use:
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This lesson discusses how open market operations effect the rate at which banks lend to each other overnight. [Banking, Money, Finance playlist: Lesson 14 of 24]

Subject:
Business and Communication
Finance
Economics
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Khan, Salman
Date Added:
01/17/2012
Banking, Money, Finance: Federal Funds Rate and the Money Supply
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This lesson presents more information on the mechanics of the Federal Funds rate and how it increases the money supply. [Banking, Money, Finance playlist: Lesson 15 of 24]

Subject:
Business and Communication
Finance
Economics
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Khan, Salman
Date Added:
01/17/2012
Banking, Money, Finance: How "Money" is Created in a Fractional Reserve Banking System.
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This lesson talks about how money is created in a fractional reserve banking system. [Banking, Money, Finance playlist: Lesson 4 of 24]

Subject:
Business and Communication
Finance
Economics
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Khan, Salman
Date Added:
01/17/2012
Banking, Money, Finance: How Reserve Requirements Limit How Much Lending a Bank Can Do
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This lesson explains reserve requirements and how they limit how much lending a bank can do. [Banking, Money, Finance playlist: Lesson 8 of 24]

Subject:
Business and Communication
Finance
Economics
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Khan, Salman
Date Added:
01/17/2012
Banking, Money, Finance: Introduction to Government Debt and Treasuries
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This lesson discusses government debt and treasuries. It explains what it means that Federal Reserve Notes are issued by the Reserve Bank but are not an obligation on the government. [Banking, Money, Finance playlist: Lesson 12 of 24]

Subject:
Business and Communication
Finance
Economics
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Khan, Salman
Date Added:
01/17/2012
Banking, Money, Finance: Introduction to the Bank Income Statement
Conditions of Use:
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This lesson is an introduction to the income statement of a bank, and to income statements, in general. [Banking, Money, Finance playlist: Lesson 2 of 24]

Subject:
Business and Communication
Finance
Economics
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Khan, Salman
Date Added:
01/17/2012
Banking, Money, Finance: Mechanics of Repurchase Agreements
Conditions of Use:
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This lesson discusses the mechnics of repurchase agreements, reposession transactions and loans. [Banking, Money, Finance playlist: Lesson 20 of 24]

Subject:
Business and Communication
Finance
Economics
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Khan, Salman
Date Added:
01/17/2012
Banking, Money, Finance: Pros and Cons of Various Banking Systems
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This lesson talks about the pros and cons of various banking systems and talks more about using gold as a standard. [Banking, Money, Finance playlist: Lesson 18 of 24]

Subject:
Business and Communication
Finance
Economics
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Khan, Salman
Date Added:
01/17/2012
Banking, Money, Finance: Seeing How Reserve Ratios Limit How Much Lending I Can Do
Conditions of Use:
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This lesson explains how reserve ratios limit how much lending an individual can do. [Banking, Money, Finance playlist: Lesson 9 of 24]

Subject:
Business and Communication
Finance
Economics
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Khan, Salman
Date Added:
01/17/2012
Banking, Money, Finance: The Rationale for Targeting Interest Rates
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This lesson explains the rationale for targeting interest rates instead of directly having a money supply target. [Banking, Money, Finance playlist: Lesson 16 of 24]

Subject:
Business and Communication
Finance
Economics
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Khan, Salman
Date Added:
01/17/2012
Banking, Money, Finance: Understanding the Weak Points of Fractional Reserve Banking (1 of 3)
Conditions of Use:
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This lesson explains the weak points of fractional reserve banking. [Banking, Money, Finance playlist: Lesson 22 of 24]

Subject:
Business and Communication
Finance
Economics
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Khan, Salman
Date Added:
01/17/2012
Banking, Money, Finance: Understanding the Weak Points of Fractional Reserve Banking (2 of 3)
Conditions of Use:
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This lesson continues the discussion of fractional reserve banking. It further discusses the FDIC, deposit insurance and its side effects. [Banking, Money, Finance playlist: Lesson 23 of 24]

Subject:
Business and Communication
Finance
Economics
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Khan, Salman
Date Added:
01/17/2012
Banking, Money, Finance: Understanding the Weak Points of Fractional Reserve Banking (3 of 3)
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This lesson is a summary of thoughts of why Fractional Reserve Banking is a subsidy to banks and allows them to arbitrage the yield curve. [Banking, Money, Finance playlist: Lesson 24 of 24]

Subject:
Business and Communication
Finance
Economics
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Khan, Salman
Date Added:
01/17/2012
Biology: B Lymphocytes (B cells)
Conditions of Use:
Remix and Share
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This 14-minute video lesson provides an overview of B cells (B lymphocytes) and how they are activated and produce antibodies. [Biology playlist: Lesson 53 of 71].

Subject:
Biology
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Salman Khan
Date Added:
05/18/2012
Biology: Bacteria
Conditions of Use:
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This 18-minute video lesson provides an introduction to bacteria. [Biology playlist: Lesson 18 of 71].

Subject:
Biology
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Salman Khan
Date Added:
05/18/2012
Biology: C-4 Photosynthesis
Conditions of Use:
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This 17-minute video lesson looks at C-4 Photosynthesis: How some plants avoid photorespiration. [Biology playlist: Lesson 33 of 71].

Subject:
Biology
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Salman Khan
Date Added:
05/18/2012
Biology: CAM Plants
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This 9-minute video lesson looks at how CAM Plants are able to fix carbon at night so they don't have to keep their stomata open during the day. [Biology playlist: Lesson 34 of 71].

Subject:
Biology
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Salman Khan
Date Added:
05/18/2012
Biology: Cancer
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This 13-minute video lecture provides an introduction to what cancer is and how it is the by-product of broken DNA replication. [Biology playlist: Lesson 13 of 71].

Subject:
Biology
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Salman Khan
Date Added:
05/18/2012
Biology: Cytotoxic T Cells
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This 10-minute video lesson discusses how cytotoxic T-Cells get activated by MHC-I/antigen complexes and then proceed to kill infected cells. [Biology playlist: Lesson 56 of 71].

Subject:
Biology
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Salman Khan
Date Added:
05/18/2012
Biology: DNA
Conditions of Use:
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This 28-minute video lesson provides an introduction to DNA. [Biology playlist: Lesson 6 of 71].

Subject:
Biology
Genetics
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Salman Khan
Date Added:
05/18/2012
Biology: Embryonic Stem Cells
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This 2-minute video lesson provides an overview of early development of a zygote to an embryo. It also discusses embryonic and somatic stem cells. [Biology playlist: Lesson 12 of 71].

Subject:
Biology
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Salman Khan
Date Added:
05/18/2012