What options do I have if my employee, who can work from home, is struggling to do so because they have young children at home who need “teaching” and supervision?

This is likely to be a common situation and employers and employees are going to have to take a pragmatic approach. You could enter into a temporary flexible working arrangement perhaps agreeing to vary working hours/days or reducing targets or agree to use some annual leave.

Employees could ask to take a period of unpaid leave, asserting their right to time off to care for a dependant but the lack of pay is likely to be unappealing.

Alternatively employees who are unable to work because they have caring responsibilities as a result of COVID-19, which includes childcare responsibilities, can be furloughed.