Sine, cosine, and tangent by Sal Khan at Khan Academy
July 26, 2024
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March 21, 2019July 22, 2024Academics, Social Studies
What is Economics
A good video primer from Study.com.
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March 4, 2019July 22, 2024Sundry
Want to Change the World: Start by Making Your Bed
This speech by Admiral William McRaven has been viewed more than 4 million times for a good reason.
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May 27, 2019May 27, 2019Math
Intro to Trigonometry
Sine, cosine, and tangent by Sal Khan at Khan Academy
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May 27, 2019May 27, 2019Math
Intro to Trigonometry
Sine, cosine, and tangent by Sal Khan at Khan Academy
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March 21, 2019March 21, 2019Social Studies
SAT US History Study Guide
From the Gilder Lehrman Institute of American History.
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March 21, 2019March 21, 2019Math
Calculus for 5th Graders
Calculus is one of the more intimidating ideas in mathematics, but at its root it’s just about change. Continuous change. For example, a staircase has a changing slope, but because it is composed of right angles we can use algebra to figure things out. The same applies for a ramp–it’s at an angle, but it’s...