Who knew!
Good for you, for trying this! I'll have to try it soon (have my eye on a good tree up the street, lots of nuts). In school (as part of California history) we were taught about how the natives lived off of acorns and how they had to leach out the tannic acid to make them edible/palatable. I wish the teacher had gone a step further and actually done a food demonstration!
That would have transitioned it from standing in front of a classroom to actual teaching.
I believe that would get her in trouble with the union.