The decision has been taken by the Western Isles Council, which runs the archipelago’s schools. Out of 32 councils into which Scotland is divided, the Western Isles have the highest share of Gaelic speakers (52%).
Gaelic-medium education is available in all schools in the Western Isles as well as in a handful of other schools in the rest of Scotland. Under that system, during the early years of primary school all classes are taught in Gaelic. Later on, English is progressively introduced. The aim is for the children, by the end of their schooling, to be proficient in both languages.
In a Twitter thread, the Gaelic Board (Bòrd na Gàidhlig) welcomed the decision and recalled that research shows that children following Gaelic-medium education perform in a similar way or better —in all subjects including English— than those who are not taught through the medium of that Celtic language in Scotland.