The sum of the exterior angles in an n-sided polygon Whiteboard exercise Play

The sum of the exterior angles of a convex polygon Student activity Play

The sum of the exterior angles of a convex polygon Animation Play

The sum of the interior angles in the polygons Whiteboard exercise Play

The Sun Class activity Play

The Sun Whiteboard presentation Play

The Sun Animation Play

The Sun Student activity Play

The Sun and other stars Slideshow Play

The Sun as a light source Student activity Play

Time and distance Whiteboard presentation Play

Time and distance Class activity Play

Triangles and squares in coordinates Whiteboard exercise Play

Trigonometric ratios – distance to a star Whiteboard exercise Play

Trigonometric ratios – problems Student activity Play

Ultraviolet Whiteboard exercise Play

Ultraviolet Student activity Play

UV radiation Animation Play

Variability of data sets Student activity Play

What are similar shapes? Student activity Play

What can be observed during an eclipse of the Sun? Student activity Play

What can be read from H-R diagram? Student activity Play

What is a perimeter? Student activity Play

What is a perimeter? Animation Play

What is an area? Student activity Play