n Learning and Teaching Mathematics - Capitalising on mathematical moments

Volume 2011, Issue 10
  • ISSN : 1990-6811


Imagine that Sange is a learner in your Grade 9 Mathematics class. One day Sange points out that he has just turned 15 and as a result is a quarter of his grandfather's age. How could you as a teacher capitalise on this simple observation and explore its potential richness? Perhaps a starting point would be to set up a table of ages in order to compare Sange's age with his grandfather's at different times in both the past and future. A partial comparative table is shown below which includes simplified ratios of Sange's age to his grandfather's age. The shaded column shows their present ages.

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