Labour's flagship £2 million summer school scheme for bright children should demonstrate that it offers value of money, Ofsted said today.
The education watchdog praised the summer schools, run by the National Academy for Gifted and Talented Youth at Warwick University, for their "excellent" teaching.
But despite school and Government subsidies to limit the costs, a few pupils still cancelled their places at the summer schools last year.
In some cases schools had not budgeted to support their 11 to 16-year-olds who were going on these summer schools, the report says.
The Academy was set up in 2002 and Ministers intended the summer schools to help make sure talented children develop to their full potential.
Each place at a summer school costs £1,900.
The Department for Education ad Skills subsidises places to limit the charges that schools and parents pay to £640 for a three-week course and £490 for a two week course.
Even though hundreds of schools offered subsidies, 16 pupils still cancelled their places at summer schools because of funding problems.
Ofsted recommended that the Academy should " demonstrate how summer schools represent good value for money".