6th May 2005 at 01:00
KS 2-4

Use the data in the article to make estimates about the road. The road is 417 miles long, how many kilometres is this? Estimate its surface area (consider appropriate units). Estimate how much material would be required to re-surface the entire road. 91 000 motorists pass junction 4 every day.

Based on this, estimate how much fuel is used per mile per day around junction 4?

Based on the travelling times in the article, what were the average speeds of the journeys described 1754, 1776 and 1818? What is the average speed today? How could you estimate the increases in traffic flows caused by concerts at Knebworth? The article states that Torness Nuclear Power Station generates 1 364 megawatts of electricity. How many Watts in a megawatt? Express 1 364 magawatts in standard form. Find out about "Fermi Questions", which involve using mathematical thinking to make intelligent estimates of quantities at http:iws.ccccd.edumbrooksdemosfermi_questions.htm Fermi Questions can be used with pupils from KS2 upwards and provide very effective motivation for developing problem solving skills.

Log-in as an existing print or digital subscriber

Forgotten your subscriber ID?


To access this content and the full TES archive, subscribe now.

View subscriber offers


Get TES online and delivered to your door – for less than the price of a coffee

Save 33% off the cover price with this great subscription offer. Every copy delivered to your door by first-class post, plus full access to TES online and the TES app for just £1.90 per week.
Subscribers also enjoy a range of fantastic offers and benefits worth over £270:

  • Discounts off TES Institute courses
  • Access over 200,000 articles in the TES online archive
  • Free Tastecard membership worth £79.99
  • Discounts with Zipcar,, Virgin Wines and other partners
Order your low-cost subscription today