I disagree.....I guess as long as the weight is not revelaed to even the kid being weighed that I can see thit as ok. You know how kids are, they will discuss and a child that thinks they are perfectly normal may weigh a little more than another and discuss it honestly and be made fun of.
I also think that if there is a 210 lb 10 year old, then the parents know, I just don't see the point in it, parents of obese kids, have to know they are obese, what is weighing them in school and sending the parents a letter that says "your kid is fat, lay off the potato chips" going to help? The parents have to know this already and not care....The school certainly can't ENFORCE a diet at home.