01:00:00

#### All about conic sections

This is a fully interactive program allowing many useful ways of investigating conic sections both visually and algebraically. It comes with a full set of explanatory notes for both teacher and pupil.

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00:16:00

#### Fractions 3

Mutiplying and dividing fractions: a systematic approach to this perennial problem.

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00:03:00

#### Numbers HK

Harry gives an introduction to the difficulty of writing large numbers in Roman Numerals

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