Schools are to be given annual report cards showing their exam results and attendance rates.
Ofsted is to publish a one-page public overview for every primary and secondary in England amid concerns that governors need more information to hold their schools to account.
Chief inspector Sir Michael Wilshaw warned that some school governors are not up to scratch and would rather spend time "looking at the quality of lunches and not enough on maths and English".
The new report card - the School Data Dashboard -will give information on how well a school is performing in test and exam results, as well as attendance, compared with other similar schools.
Ofsted said it will publish the documents, updated annually, for more than 20,000 state primary and secondary schools.
At an event to mark the launch, Sir Michael is expected to say that governors should have access to the right information to understand and challenge their school, with no excuses for those that fail to do so.
"The School Data Dashboard I am launching today raises the stakes," he said.
"Many governors know their school well already. But for those that don't, there are now no excuses. Inspectors will be very critical of governing bodies who, despite the dashboard, still don't know their school well enough."
He adds: "Good governors focus on the big issues: the quality of teaching, the progress and achievement of their pupils, and the culture which supports this.
"The best governing boards get the balance right between support and challenge. They ask the right questions, whatever school they're in - maintained schools, in individual academies, and especially in academy chains, where focused governance has brought about the greatest improvements."