Schools have been told they must do better at spotting gifted and talented pupils.
Although schools are doing better at keeping the brainier kids busy at school, more needs to be done in day-to-day lessons, a report has shown.
School inspectors at Ofsted, who wrote the report, also said schools were not doing enough for the so-called 'under-achievers', who often have hidden talents.
'School is boring'
These pupils can be hard to reach because they often don't seem to be interested in school and don't show off what they are good at.
The report sets out the difference between 'gifted pupils' who are very good at curriculum subjects like maths, English and science, and 'talented' kids, who are brilliant at sports, art or music.
This report comes as 13-year-old Cliff John from Wales has started a battle with his teachers after he refused to go to school because it was "too boring". Cliff is exceptionally clever and says lessons do not challenge him.