It appears that Katie is very upset by the National Union of Teachers (NUT) strike, which is planned for this Thursday (July 10).
The teachers will be joining more than a million public sector workers - including firefighters and council staff - in the walk out over pay and working conditions.
While many parents - like Katie - find teachers' strikes inconvenient, few would write off their actions quite as harshly as Katie, who likened teachers to gerbils.
The strike has been planned since early June - giving Katie quite some time to arrange alternative childcare. But she isn't going to let pre-planning stand in the way of a good rant.
Indeed, it's not just teachers who come under fire. Katie's also decided to take a pop at stay at home mums.
This isn't the first time Katie has vented her fury at stay at home mums. In January she launched into a Twitter tirade about how stay at home mums are work-shy.
It's unclear why Katie feels so strongly about stay at home mums - perhaps one pushed in front of her in the queue in Costa once.
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