Surely more time studying = better performance at school ??

My daughter's school had three staff development/training days added on to the recent school break, giving her a full two weeks off school in October. Towards the end of the recent school break I received a letter from the school stating that the next 'learning review day' is November 14 and reminding me that students dont attend school on that day. I dont need my twenty yrs experience of teaching 11-18 yr olds to conclude that my child would be far better off going to school for an extra four days this term ! The 'learning review' has never 'reviewed current performance and set targets for improvement' effectively and with real impact and should be completely integrated into day to day teaching and learning anyway. All staff developement should be organised in a way that allows children to continue attending school. Good sense tells me that, within reason, if students spend more time studying they will do better at school!