This geometry lesson shows that that an inscribed angle is half of a central angle that subtends the same arc. [Geometry playlist: Lesson 24 of 31]

This site teaches High Schoolers how to Interpret Categorical and Quantitative Data through a series of 45 questions and interactive activities aligned to 2 Common Core mathematics skills.

This site teaches Statistics and Probability to 7th graders through a series of 475 questions and interactive activities aligned to 10 Common Core mathematics skills.

This site teaches Expressions and Equations to 8th graders through a series of 4712 questions and interactive activities aligned to 32 Common Core mathematics skills.

This site teaches Functions to 8th graders through a series of 1920 questions and interactive activities aligned to 17 Common Core mathematics skills.

This site teaches Geometry to 8th graders through a series of 2398 questions and interactive activities aligned to 19 Common Core mathematics skills.

This site teaches Statistics and Probability to 8th graders through a series of 303 questions and interactive activities aligned to 5 Common Core mathematics skills.

This site teaches The Number System to 8th graders through a series of 676 questions and interactive activities aligned to 6 Common Core mathematics skills.

The Growth Mindset Activities are designed to help your students build growth mindsets and develop learning strategies to start the school year strong. Developed in partnership with PERTS, a Stanford center that builds on the research done by Carol Dweck, the mindset activities are fun and age appropriate, providing a structured way for students to explore the science behind the idea that 'You can learn anything'

The Growth Mindset Activities are designed to help your students build growth mindsets and develop learning strategies to start the school year strong. Developed in partnership with PERTS, a Stanford center that builds on the research done by Carol Dweck, the mindset activities are fun and age appropriate, providing a structured way for students to explore the science behind the idea that 'You can learn anything'

Khan Academy and PERTS, Stanford University’s applied research center on academic mindsets, created this lesson together in order to provide a few activities to introduce students to the concept order to provide a few activities to introduce students to the concept that intelligence can be developed. Feel free to adapt and edit these activities below to meet the needs of your classroom!

This 7-minute video lesson looks at 2010 IIT JEE Paper 1 Problem 39.

This 7-minute video lesson continues to look at 2010 IIT JEE Paper 1 Problem 39.

This 3-minute video lesson concludes the discussion of 2010 IIT JEE Paper 1 Problem 39.

Ideologies of political parties in the United States. General views of liberals (generally associated with the Democratic Party) and conservatives (generally associated with the Republican Party).

Much of statistics is based upon using data from a random sample that is representative of the population at large. From that sample mean, we can infer things about the greater population mean. We'll explain.

Sal shows examples of intersection and union of sets and introduces some set notation.