Many UK children are becoming ill and not doing well in school because they don't have a permanent home.
The charity Shelter says their parents may have lost their house or flat because they weren't able to pay for it.
Moving around lots
Sometimes mums and dads have been forced to leave their homes by the people they rent the house from.
Familes can struggle to find new places to live, and end up moving around too much.
That can affect kids a lot.
Hard to make friends
Shelter says sometimes they find it difficult to make new friends or do well at school, because they have to go to many different ones.
Some kids become ill because the place they stay while waiting for a new house isn't in good condition.
Emily and her family were homeless for nearly a year and had to live in a bed and breakfast.
"We had no space to leave our toys and my brother was sick a lot," she says.
Shelter is now trying to raise money to help families find new homes and help kids adapt to going to new schools.