Frequency polygon Student activity Play

Frequency polygon Whiteboard exercise Play

Frequency polygon – expected lifetime for men Animation Play

Frequency polygon – influence of soil irrigation on the yield Animation Play

Galaxies Whiteboard presentation Play

Galaxies Class activity Play

Galaxies Whiteboard presentation Play

Galaxies Class activity Play

Galaxies, clusters and nebulae Student activity Play

General polygons Student activity Play

High-temperature plasma Animation Play

How far away are the stars? Whiteboard exercise Play

How far away are the stars? Student activity Play

How light travels Illustration Play

How light travels Student activity Play

Inscribed circles Whiteboard exercise Play

Inscribed circles, circumscribed polygons Student activity Play

Let's investigate perimeters and areas Student activity Play

Line of reflection symmetry Whiteboard exercise Play

Line of reflection symmetry Student activity Play

Luminosity – temperature diagram Illustration Play

Main sequence Animation Play

Making angles that are multiples of 45° Student activity Play

Making angles that are multiples of 60° Student activity Play

Meteoroids Student activity Play