This is a statistical measure designed to show how well a school has helped its pupils progress since they arrived from primary school, taking into account their different starting points.

BBC: Guide: Secondary league tables

Primary school children from Berkshire and Oxfordshire will get a taste of different languages, cultures and histories.

BBC: More primaries teaching languages

But Tim, a teacher at Chew Magna Primary School, Bristol, UK, regularly travels with his pupils into entirely different digital worlds with his children - worlds that are mystical, musical, and eerily beautiful lands.

BBC: NEWS | Technology | Pupils learn through Myst game

With the existing Sats, about to be taken by more than 580, 000 primary school children in England, the questions cover a range of abilities so children can be scored at different levels.

BBC: All school Sats tests 'might go'