Mathematics of a Total Solar Eclipse

A good 'similar triangles' activity to explain the shadow of a total solar eclipse. Harder examples of the main activity.

Lesson plan Bulletpoints for lesson Supporting presentation SOHO image of Sun Eclipse map SOHO website

Big Lebowski Ratio

Nevermind the film, in which aspect ratio to watch it? This is a screen shot of a DVD menu with viewing options. Are the ratios the same, does it matter?! A nice real life example of using ratio.

Ratio

Simple ratio questions, with answers too

Ratio 2

More simple ratio questions, still with answers too.

Ratio Questions

Three differentiated worksheets, from the national numeracy strategy, of easier, medium and more difficult ratio questions. I print each sheet on green, yellow, red paper and ask pupils to pick their own level.