Nice attempt at a metaphor (hence why I upvoted) but TBH it misses the mark as it too 'passive' - the real 'horror of education' is that it 'calls upon' students to align their identity with the system, requiring that they 'act through the examination system', if you get my drift... ?

A more suitable metaphor might involve teaching them to breath with only the top tenth of their lungs, thereby invoking the anxiety induced by said system!?

Although that's not quite there either - I think we need an entire story incorporating many horrific metaphors to convey how bad mainstream education is for our kids!