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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