It has been 'lights out' for Stratford High School over the past week with the school experiencing continuing power outages due to a fault in the transformer located outside the school.
Just a week into the new school term and the school has lost power four times.
Principal Phil Keenan says he feels "incredibly frustrated" for the senior students in particular who are on the countdown to external examinations.
"This time of year is stressful enough for the senior students, so the constant disruptions to their important exam preparation is creating a lot of frustration among the students and staff."
Wood technology teacher Ian Anglesey says vital internal assessments are being disrupted by the power outages.