Khan Academy

Khan Academy Ed Talks with Professor Thomas Guskey, PhD

How can grading reform lead to student success? On the next Khan Academy Ed Talks, Thomas Guskey, PhD, Author and Professor Emeritus at the...

Humans and ecosystems: how do vultures provide ecosystem services? | Khan Academy

Changes in biodiversity can influence humans’ resources, such as food, energy, and medicines, as well as ecosystem services that humans rely on—for...

Biodiversity and ecosystem health: a Hawaiian Islands case study | Khan Academy

Biodiversity describes the variety of species found in Earth’s terrestrial and oceanic ecosystems. The completeness or integrity of an ecosystem’s...

Ecosystem dynamics: Clark’s nutcrackers and the white bark pine | Khan Academy

Ecosystems are dynamic in nature; their characteristics can vary over time. Disruptions to any physical or biological component of an ecosystem can...

Khan Academy Ed Talk with Chase Nordengren, PhD

How can we set learning goals during the summer school break? On the next Khan Academy Ed Talks, Chase Nordengren, principal research lead for...

Khan Academy Ed Talk with Thomas Guskey, PhD

How can grading reform lead to student success? On the next Khan Academy Ed Talks, Thomas Guskey, PhD, Author and Professor Emeritus at the...

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We want everyone to be able to reach their potential. Potential is everywhere. Access is not. We are working to level the playing field by working...

Natural hazards | Earth and society | Middle school Earth and space science | Khan Academy

Mapping the history of natural hazards in a region, combined with an understanding of related geologic forces can help forecast the locations and...

Galaxies and gravity | Earth in space | Middle school Earth and space science | Khan Academy

Earth is part of a solar system, which is part of a galaxy, which is part of a galaxy group. All of these systems are held together by gravity, a...

Regional climates | Weather and climate | Middle school Earth and space science | Khan Academy

Climate is the long-term pattern of weather in a particular region. A region’s climate is influenced by many factors, including latitude,...

Plate tectonics and the ocean floor | Middle school Earth and space science | Khan Academy

In the ocean, tectonic processes continuously create and destroy oceanic crust. New crust is created at mid-ocean ridges and moves away from them...

Introduction to plate tectonics | Middle school Earth and space science | Khan Academy

Earth's lithosphere is broken up into tectonic plates, which move slowly over time. A plate boundary is where two tectonic plates meet. There are...