You'd be better off teaching your daughter on the strike days about the history of strikes, why workers withdraw their labour and why they have the right to do so, rather than feeding her anxiety or playing into her idea that teachers should wait for a more convenient time (for her). The ONS has some great resources here. ^
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Remind her that she may well be a striking worker one day. My husband and I will be on strike and we will be teaching our daughters- much younger than yours- exactly this. And going on a march that we are spending the weekend making banners for. Your daughter could show solidarity at a march or on a picket line. Or- It's cold right now- striking teachers would appreciate her bringing them a couple of flasks of tea or some biscuits.
And get her to listen to the lyrics of by Billy Bragg:
There is power in a factory, power in the land
Power in the hand of the worker
But it all amounts to nothing
If together we don't stand
There is power in a Union
Now the lessons of the past
Were all learned with workers' blood
The mistakes of the bosses we must pay for
From the cities and the farmlands
To trenches full of mud
War's always been the bosses' way, sir
The Union forever defending our rights
Down with the blackleg, all workers unite
With our brothers and our sisters
From many far off lands
There is power in a Union
Now I long for the morning that they realize
Brutality and unjust laws cannot defeat us
But who'll defend the workers who cannot organise
When the bosses send their lackeys out to cheat us?
Money speaks for money
The Devil for his own
Who comes to speak for the skin and the bone?
What a comfort to the widow
A light to the child
There is power in a Union
The Union forever defending our rights
Down with the blackleg, all workers unite
With our brothers and our sisters
Together we will stand
There is power in a Union^
Play it loud. Solidarity to all striking workers during this awful time with this awful government.^