misdee- you are allowed 10 days holiday a year from school, and providing your children aren't in exam years (meaning GCSEs/A level type ones) then I can't see the problem TBH.
Yes, school is very important (I was a teacher) and its merits should be pushed all the way.
But IMO family time is very important too - and some people don't have the time available or the finances available to do out of term holidays.
My dad worked in a factory when me and my brother was little. His only holidays were prescribed by the factory in shut down weeks. these were not in school holiday time, so we alsways went away in term time. Both me and my brother held school and education as important, never truanted or bunked off, never caused trouble at school and always worked hard. We both gained a good range of qualificatiosns, both have degrees and both work in decent jobs now. Missing two weeks of school once a year really isn't going to hurt, honest.
Fact is that right now holidays are MUCH cheaper in term time. Until that changes people will always have this dilemma. Unless holiday companies make changes people will always take their children out, and really when you look at it that way who can blame them, especially if finances are tight.
I am having my first term time holiday this year, having left teaching at easter. The exact smae holiday is costing be £1500 cheaper than going in August - half price!!! I know this as I did work out both costs out of curiousity. that is a heck of a lot of money!
Having a holiday together - away from home, no house/work distractions, relaxing and having fun, is really important. IMO it is just as important as schooling and education (and work for that matter). Has to be the balance.