According to the Department for Education, the scheme will teach children "innovative techniques" like mindfulness, relaxation and breathing exercises to "help them regulate their emotions".
The engagement marks the start of Kate's patronage of Place2Be's Children's Mental Health Week, which involves speaking to pupils and their parents about the link between nutrition, regular exercise and positive mental outlook.
The Duchess has made mental health in the young one of the cornerstones of her public work.
"We are rolling out significant additional resources to schools to improve mental health provision at an earlier stage through the Government's Green Paper proposals, including awareness of "mental health first aid" techniques and teams of trained mental health staff to work with and in schools".
Ms Corne said that the sessions help youngsters improve physical and mental wellbeing and counter pressure about how young people should look, feel and behave.
"I am also very happy to see that our neighbours in North Yorkshire will have the opportunity to participate in this landmark trial".
"It stands in the way of people who are using drugs reaching out for help, it's about having the entire school community saying it's okay to say I'm not okay and to reach out for the help they need". The council states that it wouldn't be right for them to only treat 35% of children with a broken arm, so why should only this many children receive support and care for mental health struggles.
Place2Be found that 56% of children and young people say they worry "all the time" about at least one thing to do with their school life, home life or themselves.
Kate's second stop of the day was to Alperton Community School, where she joined a discussion with teachers about kids' school readiness and teacher welfare and took part in pupils' Random Acts of Kindness Club, an extra-curricular club focussing on the wellbeing of the school community.
Families, doctors and other mental health professionals know how important it is these children have access to a dedicated children's health facility, but the Saskatchewan Party government did not fulfill their wish. "Crucially, services like these can lessen the anxiety, pain and anguish that some teens go through, but also reduce their need for intensive support further down the line".