How plants receive and transform information about day length Animation Play

How to construct a regular hexagon Animation Play

How to measure gravitational acceleration? Student activity Play

How to measure gravitational acceleration? Slideshow Play

How to measure gravitational acceleration? Whiteboard exercise Play

Image in a microscope Whiteboard exercise Play

Images in lenses Student activity Play

Images in lenses Animation Play

Imperial units of length Animation Play

Imperial units of length Student activity Play

Imperial units of length Student activity Play

Imperial units of length – equal measures Whiteboard exercise Play

Induction of free oscillations Animation Play

Infra-red radiation used in spectroscopy Student activity Play

Inscribed angle in a semicircle Student activity Play

Is a practical demonstration reliable? Whiteboard exercise Play

Is a practical demonstration reliable? Student activity Play

Isosceles triangles – solving problems Whiteboard exercise Play

Length constructions Student activity Play

Length constructions Simulation Play

Length contraction (Lorentz-Fitzgerald contraction) Glossary Play

Length contraction (Lorentz-Fitzgerald contraction) Whiteboard exercise Play

Length contraction (Lorentz-Fitzgerald contraction) Student activity Play

Length of a side of a cube Whiteboard exercise Play

Length of pencils Animation Play