Lesson Six teaches students how to use 4 figure grid references to accurately locate squares on an Ordnance Survey map. Students first learn that 4 figure grid references specify the column then row to identify a whole square from the bottom left corner. They then practice writing grid references for 20 squares on a provided map and play a battleships game with their partner to reinforce using the references. An extension worksheet provides additional exercises to strengthen students' skills with 4 figure grid referencing.

1. Lesson Six- How do 4 figure grid references work? Aim: * To be able to use 4 figure grid references

2. Starter - Four figure grid references let you find a whole square Always read from the bottom left hand corner of a square. Match A, B, C and D to the correct grid references from 01 50, 02 50, 01 51 and 02 51 Remember ‘ Along the corridor and up the stairs’

3. Main Activity 1 – Follow this weblink to learn more about four figure grid references http://www.mapzone.co.uk/ Once you are on the site, click on homework help, English version, mapability, grid references and read through the pages.

4. Main Activity 2 You will be given an Ordnance Survey map. In pairs write down the 4 figure grid references for 20 squares.

5. Plenary Play 4 figure battleships with your partner (see worksheets).

6. Extension Do the exercises on the four figure grid references worksheet.