UNESCO resource kit - science and technology educa...

UNESCO Module 26: Working with numbers=, Teecner's Notes
Page 5, 6:: These two pages help students to produce simple maps 'and plans
of :familiar areas, an important skill when considering land use, for example. It is
also useful when carrying out ecological surveys.
Page 7, 8: The population of the world is a large number (6000 million, or
6 billion). These activities will help students to relateto this number by
representing the population asa small village of 100 people. They will need to be
able to scale back and forth between these two numbers.
Comment on millions .and bllllons
Everyone agrees that a million is 1000 000. However, in the past, there have been
different usages of the terms billion and trillion. Most people today follow the
American usage (which is also the international scientific convention):
Note on equipment
Page 2
Students will require:
• paper, pencil, ruler;
• metre rule or tape measure;
• the activities on pages 5 - 8 require the use of calculators, particularly for
scaling up and down of quantities.