If so, you might like to check the new resource for teaching Ordnance Survey map symbols (key stage 3) on the GA’s list of resources and classroom activities for use with Ordnance Survey maps.
The OS says:
“Digimap for Schools is an online mapping service providing current and historical Ordnance Survey maps for viewing and printing. There are 12 fixed scale map views on the screen. These use digital versions of Ordnance Survey’s Explorer, Landranger and MiniScale® products. Also included are Ordnance Survey MasterMap® maps, Great Britain’s most detailed mapping, including building outlines, pavement edges, walls and fences, house numbers, ground cover, benchmarks and much more. Road atlas style maps are also included.“