Following riots that marred the summer holidays, schools are welcome back students with an assembly that promotes "respect and tolerance".
The assembly that will be televised will highlight some of the encouraging tales of communities uniting following the unrest.
Leading the gathering was a former teacher who expressed her hope that it will support schools in having a "fresh start".
The riots were seen as "a deeply powerful reminder of the importance of education" by Education Secretary Bridget Phillipson.
This summer's violence started the evening following a knife attack in Southport that claimed the lives of three kids taking dance classes.
It spread to towns and cities across England and in Northern Ireland, fuelled by misinformation online, the far-right and anti-immigration sentiment.
The "Big Back to School Assembly" will be streamed across the UK from St Nicholas Church of England Primary Academy in Boston, Lincolnshire, where a map on the wall pinpoints all the countries in which its pupils were born, each one with facts to help them better understand one another's backgrounds.
With about 20 different languages spoken among the pupils, head teacher Fiona Booth said her staff were used to promoting a sense of "belonging" - but it was harder to do that during the summer holidays.
"Friday is about just kick-starting where we left off before summer, because of everybody's different experiences," she said. "The things that have been streamed [on to] children's mobile devices, [on to] grown-ups' television screens - we've had no control over that. We've not been able to temper any of that. We've not been able to anchor or bring the calm in that chaos."
Mrs Booth said some children would have family members who may have taken part in the unrest, while others were from households targeted during the violence.
She is braced for some friction between pupils, but said tolerance was "not the same as liking everybody", and that one of the school's roles was to teach children "how to disagree well".
"It's about plugging back into that message and saying that the minute you put on your jumper, the minute you say this is the school you attend, what you're actually saying is, 'and I wholeheartedly uphold all of the values that St. Nicholas promotes'," she said.
Picture News, the company running the assembly, is providing guidance for teachers dealing with difficult conversations afterwards. The advice, which aims to give children a space to "share any worries" and "tackle any misconceptions", suggests teachers open discussions like this in the morning, so that children have the rest of the day to ask questions.
Sticky notes can be a good tool to encourage children to express their emotions, it says.It advises teachers to "stick to the facts" during discussions and tell families what information they are sharing and why.
Katie Harrison, co-founder of Picture News, said teachers reached out to the company over the summer asking for support on how to talk to children about the riots."We felt there was a huge need for it," she said. "They knew that children would be coming back after the summer break and asking questions, wanting to talk about it," she added, noting that some will have "had quite a long period where they won't have had anybody to talk to about it".
She said 3,447 primary schools had registered for the event and estimated that about 550,000 children would see the assembly, which will focus on positive stories. She will talk about Middlesbrough, for example, where hundreds of volunteers took part in a clean-up after cars were set alight and missiles thrown at police in August.
Teachers, according to Ms. Harrison, desired a "fresh start" at the start of each term. "But equally they didn't want to ignore some of the events that have happened," she continued. "They desired some sort of response to it. Hopefully, we'll be able to assist them in that way."
Ms. Phillipson stated that the rioting "shook us all" in a message sent to teachers this week. "It’s important to recognise that many students and staff might be nervous about returning to the classroom," she said. "These events are a deeply powerful reminder of the importance of education – to help people tell truth from lies, encounter and understand those from different backgrounds, and grow strong and inclusive values."