A cardboard model of a prism Animation Play

A closer look at the sine Whiteboard exercise Play

A closer look at the trigonometric ratios Student activity Play

A prism Slideshow Play

A prism Whiteboard exercise Play

A prism Student activity Play

Absorption spectra Student activity Play

Absorption spectrum of gases Animation Play

Absorption spectrum of gases Student activity Play

Absorption spectrum of gases Simulation Play

Airways Animation Play

Angle between two vectors – acute, obtuse and right Whiteboard exercise Play

Angle between two vectors – acute, obtuse and right Student activity Play

Angles in a circle Student activity Play

Application of the Pythagorean theorem in 3-D Whiteboard presentation Play

Application of the Pythagorean theorem in 3-D Class activity Play

Atomic spectra of elements Student activity Play

Atomic spectrum of hydrogen Student activity Play

Attraction between current-carrying conductors Animation Play

Binoculars Student activity Play

Binoculars Student activity Play

Blood flow in the human circulatory system Student activity Play

Building the prism Simulation Play

Checking the triangle in the coordinate system Whiteboard exercise Play

Choosing the right optical instrument Whiteboard exercise Play