The recent report by the UK Education Select Committee recommending practical help to improve the education standards of disadvantage children at schools by extending the school day. The U.S. Congressional Research Service has recently looked into the pros and cons of “Year Round Schools”. You can read the report at http://www.fas.org/sgp/crs/misc/R43588.pdf
The U.S. Dept. of Education have also highlighted the need to stop the “summer slide” by posting recommendations on their blog on ways to encourage children to carry on learning during their long summer holidays.