Network Nightmare

Students practise estimating and measuring length in metres in this activity.
Make sure that students fully understand questions 2 and 3. They could restate them in their own words or explain the key facts to a partner. Discuss some good strategies that students could use, such as trial and error, drawing a diagram, making a table, or trying a simpler example first.
One way to simplify the task would be to network only one section of the school. This adjustment may be useful when students try to apply the problem to a large school.
Set up problem-solving groups (four students per group) and ask them to use estimation skills to come up with two or three options that they can then use to calculate accurately. The students could draw a scale plan of the school and use a ruler or drawing compass to solve the problem.
Tell students that the rule “only four computers to a cable” applies only to the problem given in this booklet. In reality, other networks can connect many more computers. However, the “only four computers to a cable” rule would be useful for question 2. For question 3, you may need to help students find information on cable prices.

Answers to Activity
 

1. 181 m
2.–3. Answers will vary.