HeartsTrump - it isn't just holiday companies who 'make more money' - think about a holiday cottage owner in Cornwall for example. A small business. You have to add up the cost of running that cottage for a year (mortgage, electricity, rates, tax, maintenance, replacing furniture and crockery etc, insurance, advertising, cleaning, the profit that you need to
Make to pay your own salary so that you can raise your own kids etc....). Before Michael Gove introduced this rule, you could split those costs across a season which ran from May/June to End of September. (You could take holidays during term time at the head teachers discretion before so many people did). Now, you can only guarantee renting the cottage for the six weeks of the school holidays, so have to charge more because there are fewer weeks in which to cover my costs, and by reducing the costs for non school holiday weeks I can encourage more people with pre schoolers or without kids to come so it's not sitting empty.
Also, if a number of holiday cottage providers in the area are considering moving to long term letting as they can't justify only having an income in school holidays - if demand outstrips supply then the price will go up.
My point is that it's not a faceless holiday company increasing prices for fun, many hotel and holiday rental companies are real people who work very hard to run business.
From the parental side of the fence I take a wider view than some. If my child takes a week out of class for a family holiday they might miss long division, or the formation of Oxbow lakes, or French verbs, and they may never catch up (though i would help my child to catch up). But what they gain can change their view of the world completely - using French verbs in practice, eating new food, climbing a mountain, exploring a castle, having time to draw a picture with your mum, seeing a dolphin, (or even a whale! Or a elephant!) huddling in a tent in the rain, using hand gestures to buy bread when you don't speak the language, hearing the call to prayer, counting out money in a new currency and learning about exchange rates, observing poverty or extreme wealth, great environmental management or polluted rivers, or even just playing in the pool with siblings. I strongly believe that the more we see of the world the easier it is to understand others and empathise with them and for me that's more important even that a whole GCSE grade.
So if it's a choice between being able to go on holiday in term time or not at all, then term time holidays are the way to go.
I think the law should be changed to how it worked before - head teachers could authorise up to two weeks a year.