Boris Johnson has said 12-15 year olds will be able to book their second jabs from next week.
The Prime Minister urged parents to get their kids vaccinated over the Christmas holidays, before they return to classrooms in the New Year.
From Monday December 20, 12-15 year olds will be able to visit the national booking service website and book their second Covid jabs.
It comes after Tory MPs expressed their concerns of school closures in the coming weeks.
The PM said in his press conference: "While we’re at it, from Monday, 12 to 15 years olds can book in for a second jab.
"We know how crucial it is to keep children in school, so let’s all make sure our children and young people are vaccinated before they go back next term."
His comments to keep kids in school come hours after the Education Minister said the Government is doing all they can to avoid school closures.
Tory MP Robert Halfon, chair of the Education Select Committee said it seemed like the Government were moving towards "de facto school closures".
Education Minister Alex Burghart said extra funding has been put in place so secondary schools can test their pupils before they head back into the classroom.
Secondary schools may be closed for longer over the festive period because of this.
Downing Street warned parents not to take their children out of school before term ends, responding to suggestions some parents kept their kids at home to protect them from Omicron.
The Prime Minister's spokesman said: “The best place for children – who have in many respects suffered the most through this pandemic – is in school, receiving vital face-to-face education.”
Today the UK recorded its highest daily total of lab-confirmed Covid cases since the pandemic began.
Health Secretary Sajid Javid declined to rule out further restrictions being introduced to tackle the surge.
Professor Chris Whitty stressed it's critical for people who have Covid to self isolate, as they have a "high risk of transmitting the virus and [Omicron] is an incredibly transmissible virus."
