The move is part of One Britain One Nation Day on Friday, June 25 - which is a government-backed campaign that aims to instil pride in Britain.
In a post on social media, the Department of Education said: “We’re encouraging schools across the UK to celebrate One Britain One Nation Day on 25 June, when children can learn about our shared values of tolerance, kindness, pride and respect'.
However, the move has been mocked by people online with several pointing out that the event is taking place after some Scottish schools have broken up for the summer.
A promotional video for the event showed children waving flags and singing the lyrics: “We are Britain and we have one dream, to unite all people in one great team.
“Our nation survived through many storms and many wars.”
The campaign was founded by retired police inspector Kash Singh.
Mr Singh said the concept was “born from my dream as a police officer” after coming to the UK as a six-year-old boy who “couldn’t speak a word of English”.
He said he set up the campaign in Bradford, West Yorkshire, in 2013 after retiring from the police force in 2012.
Mr Singh told Times Radio: “We started the concept in Bradford and West Yorkshire, and it’s been very, very successful indeed, so what we want to look at is taking it across the nation.
“It was something that was born from my dream as a police officer, in terms of what I’d see, in terms of my passion, pride and frustration, and something that I feel needed to be done in this country.
“This country is a brilliant country. I came to this country as a six-year-old kid who couldn’t speak a word of English. My parents were labourers, they worked in a factory and foundry, and there are fantastic people in this country.
“One of the things that was missing for me was what we need to do, is we need an organisation that the people of this country can align themselves to, to showcase their passion, pride and love for this great nation.”
He added: “Some people may have this perception that not everybody is proud of this country – let me tell you, people like me, and the millions of people who’ve settled in this country from other parts of the world, are so proud of this country.
“I think we need to celebrate that and create this spirit of oneness and togetherness, and showcase that we’re all one people of this country regardless of where you’re from.”
However, the idea has been derided by one of the Conservative Party’s own MPs, Caroline Nokes.
The MP for Romsey and Southampton North retweeted a preview of the OBON song saying: “I can’t unhear this (however fervently I wish I could)”.
Meanwhile, actress Joanna Lumley has expressed strong support for the organisation, according to the OBON website.
In a statement on the site, she said: “The aims and aspirations of OBON are extremely impressive and timely.
“I wish the project all the success it so richly deserves and I support its vision of one nation with all my heart.”
The OBON website describes its vision as to “create a strong, fair, harmonious and a proud British Nation, celebrating patriotism and respect for all our people”.