The below website collates links to a number of different sources which specifically cover the subject of dog safety. You can search by age of the child/person intended for.

http://www.peteducationresources.co.uk/dog-safety/

PDSA PetWise for School Award

A multi tier, free resource to teach children all about animals. All lessons are curriculum linked and earns the school PDSA’s “PetWise for Schools” badge and plaque to display in school upon completion
Book a dog safety talk from your local PDSA Community and Education Veterinary Nurse

Book a dog safety talk from Dogs Trust’s Community Officer
Any other dog safety talks within the area – councils?

Free downloadable poster on dog body language from APBC
Contact details