We recently had a conversation in the Sunshine & Smiles Facebook group about young people reaching puberty. There were some great resources and support shared so we've compiled a list of links here that will hopefully be of help:
Puberty and sexuality in children and young people with a learning disability - A comprehensive resource from our colleague Cherie.
Puberty, adolescence and sexual health from the Down Syndrome Association
Training session schedule from The Down Syndrome Training & Support Service, including sessions on puberty.
BBC Bitesize also have videos about puberty for children and young people with additional needs here.