Teachers recruited to become SATs markers spent hours at the weekend trying to access a training webinar run by contractor Capita.
The consultancy firm ran the first virtual key stage 2 marker training over the weekend, which was attended by over 3,750 people.
However, some teachers complained on Saturday they were unable to get into the online session and when they called the helpline, were met with no answer or were on hold for hours.
One teacher in North Yorkshire, who wished to remain anonymous, told Schools Week they emailed in their resignation after not being able to get access.
