Personally, for me, it would have had to be second year of A Levels. The work load was far too much, the content became a lot more challenging and I had just split up with my boyfriend a few months before. It wasn't the greatest period of my High School experience
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The lunches were a tragic mess at both my secondary school + sixth form . Yes, I'd say waking up is definitely one of the things I found hard at first, but it became second nature after a while.