Villiers High School in Southall, west London, was closed to most students on Wednesday 8 December when 60 members of the NUT and ATL teaching unions struck against management bullying.
An enthusiastic picket line was followed by a debate with union officers about how they could win the dispute.
Two local councillors also came along to express their support.
Staff were thankful for the many messages of support they received from all over the country.
Many were walking out for the first time.
Afterwards, one described her feelings, saying, “I cannot express how anxious I was this morning.
“But, on a personal level, the decision seemed very difficult and even as my feet were carrying me to school my heart was in my throat.
“However, the euphoria with which I was greeted erased the gut-churning feelings that I had within seconds.
“As smiling faces greeted me with arms open wide, for once I felt a part of something, part of a movement for change.
“Any regrets I may have felt paled into insignificance—I knew I’d made the right decision!”
There were talks at the Acas conciliation service on 13 December.
If these fail there will be further strikes in January.
Clitheroe Royal Grammar School
Teachers at Clitheroe Royal Grammar School in Lancashire were to strike on Wednesday 15 December over plans for it to become an academy.
Workers voted overwhlmingly for the action.