The children's commissioner for England says many are enrolled at college but aren't showing up.
Children's commissioner Dame Rachel de Souza has backed called for more support for parents and carers.
The Children's Commissioner suggested social media advertising for children should be banned.
The children's commissioner for England tells the BBC virtual private networks are a "loophole that needs closing.
Children's Commissioner for England Dame Rachel de Souza says one told her "in the night rats came and bit his face".
Dame Rachel de Souza says most schools restrict phone use and children are racking up screen time at home.
Patrick Hurley agrees with a report that found rioting children were not motivated by far right dogma.
It follows calls to change the law so children like Sara Sharif, suspected to be victims of abuse, cannot be home-schooled.