The kids Leah met are some of the luckier ones because they go to a specialist school where they get lots of support.
One boy Lewis said: "I'm happy being deaf, because I've got communication and I've got lots of friends. Being deaf is great and I don't have a problem with it."
But Georgina said she knew some deaf children were unhappy. She said: "In other schools the hearing children might laugh at the deaf children and say - look at your signing, isn't it funny? And it makes deaf children feel intimidated and upset."
The report was made for the National Deaf Children's Society, and they're worried about protecting deaf children now they've seen the findings.
The charity reckons there isn't enough awareness of the problems they face.
They said that whether deaf children use sign language or words, they do come across lots of difficulties that hearing people don't have to deal with.
Brian Gale from the charity said: "This research shows a widespread lack of awareness among social care services of deaf children's needs."
Lots of the children Leah spoke to said that things like a hearing dog or a vibrating alarm clock would make a big difference and help make the lives of deaf children easier.