The resource from Khan Academy provides practice questions for a high school world history course. This section assesses students' knowledge of human migration.

This resource from Khan Academy provides foundational-level practice questions over functions and responsibilities of the government's bureaucracy. These questions are intended for students taking high school or college level American...

Explanations and diagrams of nine graphic organizers: spider map, series-of-events chain, continuum scale, compare/contrast matrix, problem/solution outline, network tree, human interaction outline, fishbone map, and cycle.

This resource from Khan Academy provides foundational-level practice questions over the expansion of presidential power. These questions are intended for students taking high school or college level American Government and Civics...

Richly illustrated interactive activity leads you through an investigation of bird wings. Includes interesting comparisons of the bones in a bird's wings with those in human arms and of the design of wings in birds versus planes.

The resource from Khan Academy provides practice questions for a high school or college level world history course. This section assesses students' knowledge about the spread of Islam.

Follow this interactive to identify the differences between bacteria and viruses. Look through the lens of a microscope to observe how each functions and impacts humans.

Learn about the structure of the human brain with this interactive diagram. Also, find out about neurons, message transmission, and other factors that affect brain function.