The worms in them are probably better for chickens than the nut.  In fact, some animals that eat them are really after the worm. 
 
I would be reluctant to give a lot of them to confined chickens.  Acorns have tannins, which some animals can handle even in large quantity, but are toxic to others. Some animals cache them and eat them later, allowing the tannin levels to decline before consuming them. I would not worry about free ranging chickens eating too many, because they have many other options and don't tend to overeat anything that's marginally toxic.  But confined chickens have fewer options, and might be tempted to eat too much of something, just to avoid eating nothing but boring old chicken feed.
 
I don't know what species of oak your acorns came from, but those from the white oak family tend to be lower in tannins, and would therefore be safer to feed to confined chickens.  In any case, I wouldn't give them more than a light sprinkling of crushed acorns.
 
You could boil the crushed acorns to remove some of the tannins, if you don't mind putting that much effort into it.