Years 8 and 9 affected
St Ninian's High School is the latest to be hit by staff absences
As a result, year 9 students are asked to stay at home on Thursday with the same applying to Year 8 pupils on Friday.
Year 10 children at Ballakermeen are off today ahead of mock exams which are being held tomorrow.
Road closures in St John's for Tynwald Day rehearsal
Ceremony to take place on Monday 7 July
Fraudster jailed after unlawfully selling property
Report from BBC Isle of Man
Tributes paid to 'true champion' of Isle of Man music scene
Raz McVeighty, 'local legend' and Bushy's icon, dies
Southern 100 Memorial Lap and Service to take place
Ride out around Billown to pay tribute to racers and supporters