Many secondary schools, colleges and pupil referral units are unaware of how many pupils are young carers at home, according to Estyn.
The education watchdog said that as a result, the support young carers receive varies widely across Wales.
Children and young people who care for a family member are at risk of missing education and more likely to drop out of college.
Ysgol Cwm Rhymni, in Caerphilly, is one of the schools which piloted a toolkit to help support young carers.
It helped the school to identify 47 pupils with caring responsibilities and as a result many of these pupils improved their attendance, felt more emotionally supported and perform better in class.
The toolkit is one of the resources available to help support young carers while in education.