A "lack of basic information" about work to address dangerous concrete in schools in England is "shocking and disappointing", a report by MPs says.
The Department for Education (DfE) should say how many surveys are yet to be carried out and how many temporary classrooms have been ordered, it said.
The report comes a month after the last official list confirmed 214 schools and colleges had reinforced autoclaved aerated concrete (Raac).
The DfE rejected the assessment.
A spokeswoman said the government had "taken swift action, responding to new evidence, to identify and support all schools with Raac to ensure the safety of pupils and teachers".
Labour's shadow education secretary Bridget Phillipson said Education Secretary Gillian Keegan "should come to the House of Commons and explain when she and her Conservative ministers are going to get a grip of this crisis".
The Public Accounts Committee, which scrutinises the delivery of public services, warned the list of schools with Raac would grow, and expressed concern that the DfE "does not have a good enough understanding of the risks in schools".
