Teachers at St Andrew and St Francis School in Brent, west London, began a two-day strike on Tuesday of this week.
The workers, in the NUT and ATL unions, are fighting to stop the school becoming a forced academy.
The action follows a successful strike on Wednesday of last week.
Local NUT member Stefan Simms, who is a member of the NUT’s national executive committee, visited pickets.
“The mood was good and the picket line was big for a primary school,” he told Socialist Worker. “Support staff said they wanted to be on strike too.”
ATL secretary Hank Roberts said a consultation over the academy plan was a “farce”. Parents have organised a petition against the plan.