(Image Caption: A human rakes leaves into large piles, and a small dog jumps excitedly into the piles.)

Fall is officially here, and we're as excited about our new content as this doggo is about big piles of leaves! September brought new content in Art History, European and AP US History, 4th and 5th Grade Math, Khan for Educators, Philosophy, Official SAT Practice, and Science (for our friends in India!).

Arts and Humanities

AP US History (Article)

• Expanding democracy

Europe 1300-1600 (Video, Articles)

• St Michael defeats the devil in Renaissance Spain (Video)
• Fifteenth-century Spanish painting, an introduction
• Portraits of Christine de Pizan in The Queen's Manuscript

Art of the Americas to World War I (Video)

• Envisioning Manifest Destiny, Leutze's Westward the Course of Empire

Art of the Islamic World (Article)

• The Umayyads (661-749 C.E.)

Global Contemporary Art (Videos)

• Preserving Nam June Paik's Electronic Superhighway
• What's in a map? Jaune Quick-To-See Smith's "State Names"

Special Topics in Art History (Video)

• Carleton Watkins and the business of seeing the American west

Wireless Philosophy

University of Cambridge Partner Content (Videos)

• Ethics: Consent #1 (What is Consent?)
• Ethics: Consent #2 (Consent and Rights)

Test Prep

Official SAT Practice (Article)

• How to register for the SAT

Khan for Educators

Getting Started Teacher Training (U.S.) (Videos)

• Content on Khan Academy
• How to use Assignments on Khan Academy - 2019
• How to set up your class on Khan Academy - 2019
• How to use Course Mastery on Khan Academy - 2019

Math

4th Grade (Videos)

• Subtracting mixed numbers with like denominators
• Adding mixed numbers with like denominators
• Mixed number addition with regrouping
• Subtracting mixed numbers with regrouping
• Comparing fractions word problems
• Equivalent fractions on number lines
• Equivalent fractions with models
• Fraction multiplication on the number line
• Multiplying mixed numbers by whole numbers

5th Grade (Video)

• Dividing a decimal by a whole number on the number line
• Dividing whole numbers by decimals examples
• Pattern when dividing by tenths and hundredths

India Class 10 Math (Articles)

• Quadratic equations Board Questions
• Quadratic equations CBSE review

Science

India Class 10 Chemistry (Exercises)

• Conduction and non conduction of electricity
• Litmus test
• Definition of acids and bases
• Identify the nature of metal oxide and non metal oxide
• Identifying the gas released
• Affect of pH on strength of acids and bases
• Affect of concentration on pH change
• Exothermic and endothermic reactions
• Displacement and double displacement reactions
• Identify molecular formulas
• Redox reaction

India Class 10 Physics (Video, Article)

• Revision: Human eye & colourful world (Video)
• Human eye and the colourful world - board exam problems