The majority of schools in England were forced to shut their doors to some pupils as tens of thousands of teachers went on strike, data suggests.
More than half of state schools in England restricted access to pupils or were fully closed during walkouts by teacher members of the National Education Union (NEU), according to Department for Education (DfE) data.
Pupils and parents faced more disruption on Tuesday as teachers returned to picket lines in the latest strike in a long-running pay row.
The DfE said 50% of the 16,400 state schools in England known about were open but restricting attendance on Tuesday and 5% were closed.
On Thursday last week – when NEU teacher members also walked out – 47% of the 16,100 state schools in England known about were open but restricting attendance and 5% were closed.
Picket lines were mounted outside schools on Tuesday and hundreds of striking teachers marched in Westminster before taking part in a rally outside Downing Street.
Outside the DfE, which is overseen by Education Secretary Gillian Keegan, teachers turned their backs to the building and raised their fists as they chanted “Come on Gill, pay the bill”.
The latest DfE data showed London was the most affected region of the country, with 18% of state schools fully open on Tuesday.
Four unions representing teachers and school leaders said they could co-ordinate any future industrial action in England in the autumn after members voted to reject the Government’s pay offer.
The NEU’s executive is due to meet this month to decide whether to approve three more strike days in late June or early July.
Kevin Courtney, joint general secretary of the NEU, said the strike dates in the summer term are “very likely” to go ahead.
Speaking at a picket line outside City and Islington College in north London, Mr Courtney told the PA news agency: “At that stage that would be just the NEU. All the unions are balloting, we are re-balloting, but the timescales that that will lead to will be the autumn term.
“But we want the Government to settle this before the autumn term, so we want to maintain pressure on the Government before the autumn term.”
Currently only the NEU has a mandate to take strike action and it plans to re-ballot its teacher members in England to take further action in the autumn.
The Association of School and College Leaders (ASCL) is due to hold a formal ballot for national strikes in England for the first time.
Addressing teachers at the rally in central London, Mr Courtney said: “The Government has united the teaching profession as never before and we are going to win.”
The decision on teachers’ pay in England for next year has been passed to the School Teachers’ Review Body (STRB).
A DfE spokesperson said: “For unions to co-ordinate strike action with the aim of causing maximum disruption to schools is unreasonable and disproportionate, especially given the impact the pandemic has already had on students’ learning.
“Children’s education has always been our absolute priority and they should be in classrooms where they belong.
“We have made a fair and reasonable teacher pay offer to the unions, which recognises teachers’ hard work and commitment as well as delivering at additional £2 billion in funding for schools, which they asked for.”