Nicola Sturgeon has vowed to keep schools open in the west of Scotland even in council areas placed at level four.The First Minister today gave her strongest indication yet that several local authorities will this week be moved into the Government's highest level of lockdown - meaning thousands of non-essential businesses will be forced to close.But both primary and high schools will stay open to ensure youngsters can still attend class.It comes as the country's biggest teaching union, the EIS,