Sick Leave for English Teachers
There isn't any policy for sick leave for the ESL teachers as the teaching contract is just for 3 to 4 months. However, Schools in Thailand generally don't deduct money from salary for not attending School during any serious illness. it is expected from teachers to take equal responsibility to ensure they are back to School as soon as possible, but all sick leave has to be with a letter from doctor.
An employee using sick leave for three consecutive working days can be required to provide a physician's certificate proving the illness.
More about Thai labour law please visit here