An audio discussion about mathematics in The Wizard of Oz.

An audio discussion about mathematics in The Wizard of Oz.

Starting in Africa 20,000 years ago, trace the history of numbers through time, including Egyptian use of fractions and the problems of Roman numerals.

Starting in Africa 20,000 years ago, trace the history of numbers through time, including Egyptian use of fractions and the problems of Roman numerals.

Computer generated animations looking at 'Complex Numbers'.

Computer generated animations looking at 'Complex Numbers'.

Using tally sticks, a cake, a thermometer, a number line and graphics boards, David Brannan and Phil Rippon, both of The Open University, look at rational and irrational numbers.

Using tally sticks, a cake, a thermometer, a number line and graphics boards, David Brannan and Phil Rippon, both of The Open University, look at rational and irrational numbers.

An exploration into the intricacies of square roots.

An exploration into the intricacies of square roots.

A diagram of 'The Witch of Agnesi', which is discussed in the audio track 'The Wizard of Oz: From Fractions to Formulas'.