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Adding vectors algebraically & graphically
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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 I & II
Material Type:
Lesson
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Salman Khan
Date Added:
05/16/2019
Ai Weiwei's "Remembering" and the Politics of Dissent
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All art is political in the sense that all art takes place in the public arena and engages with an already existing ideology. Chinese artist, Ai Weiwei, offers an important contemporary example. The news that Chinese artist Ai Weiwei has been detained by authorities has prompted significant concern. Ai Weiwei has ben arrested by the Chinese authorities.

Subject:
Fine Arts
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Smarthistory
Author:
Beth Harris
Steven Zucker
Date Added:
05/28/2019
Albrecht Dürer, Self-Portrait (1500)
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In this art history video discussion Beth Harris and Steven Zucker look at Albrecht Durer's "Self-Portrait, 1500." (Alte Pinakothek, Munich).

Subject:
Fine Arts
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Smarthistory
Author:
Beth Harris Ph.D.
Steven Zucker Ph.D.
Date Added:
05/28/2019
Alexander Mosaic
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This art history video examines the "Alexander Mosaic" c. 100 B.C.E., tessera mosaic from the House of the Faun, Pompeii. This Roman floor mosaic may be based on a lost Hellenistic painting by Philoxenos of Eretria, The Battle of Issus, c. 315 B.C.E.). Museo Archeologico Nazionale, Naples.

Subject:
Fine Arts
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Smarthistory
Author:
Beth Harris
Steven Zucker
Date Added:
05/28/2019
Algebra: Arithmetic with Polynomials and Rational Expressions
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This site teaches Arithmetic with Polynomials and Rational Expressions to High Schoolers through a series of 4333 questions and interactive activities aligned to 26 Common Core mathematics skills.

Subject:
Mathematics
Algebra I & II
Material Type:
Activity/Lab
Interactive
Provider:
Khan Academy
Provider Set:
Khan Academy
Date Added:
05/16/2019
Algebra: Reasoning with Equations and Inequalities
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This site teaches Reasoning with Equations and Inequalities to High Schoolers through a series of 5909 questions and interactive activities aligned to 36 Common Core mathematics skills.

Subject:
Mathematics
Algebra I & II
Material Type:
Activity/Lab
Interactive
Provider:
Khan Academy
Provider Set:
Khan Academy
Date Added:
05/16/2019
Algebra: Seeing Structure in Expressions
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This site teaches Structure in Algebraic Expressions to High Schoolers through a series of 3482 questions and interactive activities aligned to 26 Common Core mathematics skills.

Subject:
Mathematics
Algebra I & II
Material Type:
Activity/Lab
Interactive
Provider:
Khan Academy
Provider Set:
Khan Academy
Date Added:
05/16/2019
Allston's Elijah in the Desert
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This art history video discussion examines Washington Allston's "Elijah in the Desert", 1818, oil on canvas, 125.09 x 184.78 cm / 49 1/4 x 72 3/4 inches (Museum of Fine Arts, Boston).

Subject:
Fine Arts
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Smarthistory
Author:
Beth Harris
Steven Zucker
Date Added:
05/28/2019
Alma-Tadema's Listening to Homer
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This art history video discussion examines Sir Lawrence Alma-Tadema's "A Reading from Homer", 1885, oil on canvas, (Philadelphia Museum of Art).

Subject:
Fine Arts
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Smarthistory
Author:
Beth Harris
Steven Zucker
Date Added:
05/28/2019
Altdorfer's The Battle of Issus
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In this art history video discussion Beth Harris and Steven Zucker examine Albrecht Altdorfer's "The Battle of Issus," 1529, oil on panel. Alte Pinokothek, Munich.

Subject:
Fine Arts
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Smarthistory
Author:
Beth Harris and Steven Zucker
Date Added:
05/28/2019
Ambrogio Lorenzetti's Palazzo Pubblico Frescos: Allegory and Effect of Good and Bad Government
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In this art history video discussion Dr. Beth Harris and Dr. Steven Zucker consider Ambrogio Lorenzetti's series of frescos "Allegory of Good Government", "Effects of Good Government in the City and the Country", and "Allegory and Effects of Bad Government in the City and the Country" Siena c. 1337-40. Sala della Pace (Hall of Peace) also known as the Sala dei Nove (the Hall of the Nine), Palazzo Pubblico, Siena.

Subject:
Fine Arts
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Smarthistory
Author:
Beth Harris and Steven Zucker
Date Added:
05/28/2019
Ancient Rome
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This art history video discussion examines a project between Khan Academy and Rome Reborn - with Dr. Bernard Frischer.

Subject:
Fine Arts
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Smarthistory
Author:
Bernard Frischer
Beth Harris
Steven Zucker
Date Added:
05/28/2019
Andrea Mantegna, Camera Degli Sposi
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This art history video discussion examines Andrea Mantegna's "Camera degli Sposi" (Frescos in the ducal palace, Mantua), 1465-74.

Subject:
Fine Arts
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Smarthistory
Author:
Beth Harris
David Drogin
Date Added:
05/28/2019
Antoine or Louis Le Nain, Peasant Family in an Interior
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This art history video discussion examines Antoine or Louis Le Nain's "Peasant Family in an Interior", 2nd quarter of the 17th century, oil on canvas (Musee du Louvre, Paris).

Subject:
Fine Arts
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Smarthistory
Author:
Beth Harris
Steven Zucker
Date Added:
05/28/2019
Apollonius, Boxer at Rest, c. 100 B.C.E.
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This art history video discussion examines Apollonius' "Boxer at Rest", c. 100 B.C.E., bronze, Palazzo Massimo, Museo Nazionale Romano, Rome.

Subject:
Fine Arts
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Smarthistory
Author:
Beth Harris
Steven Zucker
Valentina Follo
Date Added:
05/28/2019
Arch of Constantine
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This art history video discussion examines the Arch of Constantine, 315 C.E., Rome.

Subject:
Fine Arts
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Smarthistory
Author:
Beth Harris
Steven Zucker
Date Added:
05/28/2019
Arch of Titus
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This art history video discussion examines the Arch of Titus, originally Pentelic marble, early 19h-century restoration is in travertine, c. 81 C.E. (Via Sacra, Rome).

Subject:
Fine Arts
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Smarthistory
Author:
Beth Harris
Steven Zucker
Date Added:
05/28/2019
Arithmetic Operations: Adding Decimals Example 1
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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:
Mathematics
Material Type:
Activity/Lab
Homework/Assignment
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Salman Khan
Date Added:
05/16/2019
Arithmetic Operations: Adding Decimals Example 2
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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:
Mathematics
Material Type:
Activity/Lab
Homework/Assignment
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Salman Khan
Date Added:
05/16/2019
Arithmetic Operations: Adding Decimals Example 3
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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:
Mathematics
Material Type:
Activity/Lab
Homework/Assignment
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Salman Khan
Date Added:
05/16/2019
Arithmetic Operations: Multiplying Decimals 1
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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:
Mathematics
Material Type:
Activity/Lab
Homework/Assignment
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Salman Khan
Date Added:
05/16/2019
Arithmetic Operations: Multiplying Decimals 2
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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:
Mathematics
Material Type:
Activity/Lab
Homework/Assignment
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Salman Khan
Date Added:
05/16/2019
Arithmetic Operations: Multiplying Decimals 4
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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:
Mathematics
Material Type:
Activity/Lab
Homework/Assignment
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Salman Khan
Date Added:
05/16/2019
Arithmetic Operations: Multiplying Decimals 5
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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:
Mathematics
Material Type:
Activity/Lab
Homework/Assignment
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Salman Khan
Date Added:
05/16/2019
Arithmetic Operations: Multiplying Decimals 6
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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:
Mathematics
Material Type:
Activity/Lab
Homework/Assignment
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Salman Khan
Date Added:
05/16/2019
Arithmetic Operations: Subtracting Decimals Example 1
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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:
Mathematics
Material Type:
Activity/Lab
Homework/Assignment
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Salman Khan
Date Added:
05/16/2019
Arithmetic Operations: Subtracting Decimals Example 2
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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:
Mathematics
Material Type:
Activity/Lab
Homework/Assignment
Lecture
Provider:
Khan Academy
Provider Set:
Khan Academy
Author:
Salman Khan
Date Added:
05/16/2019
Art & Context: Monet's Cliff Walk at Pourville and Malevich's White on White
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This art video discussion is titled "Art & Context: Monet's Cliff Walk at Pourville & Malevich's Suprematist Composition: White on White." It looks at Claude Monet's "Cliff Walk at Pourville", oil on canvas, 1882 (Art Institute of Chicago); and Kazimir Malevich, "Suprematist Composition: White on White", oil on canvas, 1918 (MoMA).

Subject:
Fine Arts
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Smarthistory
Author:
Beth Harris
Sal Khan
Steven Zucker
Date Added:
05/28/2019
Art in Nazi Germany
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In this art history video Beth Harris and Steven Zucker discuss Paul Troost's House of (German) Art (1933-37) in relation to the Great Exhibition of German Art and the Entartete Kunst (Degenerate Art) Exhibitions of 1937 in Munich.

The House of German Art now exhibits international contemporary art in direct opposition to original National Socialist intent.

Subject:
Fine Arts
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Smarthistory
Author:
Beth Harris and Steven Zucker
Date Added:
05/28/2019
August Sander's Portraits
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This art history video discussion examines these portraits by August Sander: "Pastry Cook", gelatin silver print, 1928, "Secretary at a Radio Station", Cologne, gelatin silver print, c. 1931, and "Disabled Man", gelatin silver print, 1926.

Subject:
Fine Arts
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Smarthistory
Author:
Beth Harris
Juliana Kreinik
Steven Zucker
Date Added:
05/28/2019
Augustus of Primaporta
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This art history video discussion looks at the Roman statue of "Augustus of Primaporta", 1st century C.E. (Vatican Museums).

Subject:
Fine Arts
Material Type:
Lecture
Provider:
Khan Academy
Provider Set:
Smarthistory
Author:
Beth Harris
Steven Zucker
Date Added:
05/28/2019