Ben Goldacre casts a refreshingly sceptical eye on pseudoscience peddled in UK schools and gets a barrage of point-missing complaints for his trouble:
[Brain Gym] teach that a special theatrical yawn will lead to “increased oxidation for efficient relaxed functioning”. Oxidation is what causes rusting. It is not the same as oxygenation, which I suppose is what they’re getting at, and even if they are talking about oxygenation, you don’t need to do a funny yawn to get oxygen into your blood: like most other animals children have a perfectly adequate and utterly fascinating physiological system in place to regulate their blood oxygen and carbon dioxide levels, and I’m sure many children would rather be taught about that.