A commutator Animation Play

A commutator Whiteboard exercise Play

A commutator Student activity Play

A DC engine Slideshow Play

A DC engine Whiteboard exercise Play

A DC engine Student activity Play

A diagram of the operation of a gas turbine engine Animation Play

About cells Student activity Play

Acid rain destroys forests Animation Play

Additional information contained in chemical equations Student activity Play

Adiabatic transition Class activity Play

Adiabatic transition Whiteboard presentation Play

Adiabatic transitions in heat engines Whiteboard exercise Play

Adiabatic transitions in heat engines Student activity Play

Adiabatic transitions in nature Student activity Play

Air pollution Student activity Play

Air pollution with nitrogen monoxide Slideshow Play

Algebraic method Animation Play

Algorithm of the equation for hydrocarbon combustion Animation Play

Analysis of the products of total combustion Slideshow Play

Analytical tests in organic chemistry Class activity Play

Analytical tests in organic chemistry Whiteboard presentation Play

Application of electromagnetic forces Class activity Play

Application of electromagnetic forces Whiteboard presentation Play

Atmospheric carbon dioxide Animation Play