Video footage has emerged of a teacher reading a book about a trans teddy to a group of children.
The footage shows a lesson at Prae Wood Primary School, St Albans where the teacher is reading the book called Introducing Teddy.
The book features an unhappy boy teddy called Thomas who becomes happy after transitioning into a girl teddy called Tilly.
Lesson plans are being created by inclusion group No Outsiders featuring the book.
The book has been met with criticism
The group is run by teacher Andrew Moffat and sells £20 teaching guides for babies and children aged "from birth to 11 years old".
In the book, there is a conversation between a male teddy bear called Thomas, who feels he was born in the wrong body, and his best friend Errol.
The story said: "Thomas the teddy took a deep breath. ''I need to be myself, Errol. In my heart, I've always known that I'm a girl teddy, not a boy teddy.
"'I wish my name was Tilly, not Thomas.'
"'Is that why you've been so sad?'' Errol asked."
Footage has circulated of the controversial book
According to MailOnline, in one of the guides, No Outsiders boss Andrew Moffat wrote: "This teaching must begin in primary schools. We are all intersectional; one identity does not suffice to make up who we are.
"Children must be encouraged, and indeed taught, to explore identity and develop confidence in who they are as they navigate childhood and adolescence."
He added: "I have had moments of doubt around the No Outsiders ethos: is it the right thing to carry on in the face of such opposition? But after months of reflection and dialogue with teachers I have reached the conclusion that there is no better time for a No Outsiders ethos."
He also said: "I will teach children to explore and celebrate their own identities (not the plural - our intersectionality allows us to hold more than one identity)."
Some parents criticised the book, saying they thought it was irresponsible to be teaching this to primary school children.
One whose child was taught it at Hillcrest Primary School, Bristol said: "My daughter told me when she had a No Outsiders day with guest visitors and a lesson where they read the Teddy book.
"It's a dangerous message to send children who might be struggling. My child has ADHD. Here is a book telling them if they are unhappy maybe they are in the wrong body.
"It's an extremely attractive idea to children we know are quite vulnerable. I was cross. Within two months [of her daughter starting at the school] they had this No Outsiders lesson."