Cameron is in the fourth grade.
He plays football, baseball, basketball and he wrestles.
But his Massachusetts school sent home a letter telling his parents he's fat.
The state says 32% of students have a body mass index showing they're overweight or obese.
The letters are meant to help parents fight child obesity.
But Cam's dad says they're a waste because they don't take into account muscle mass.
Matt Watson said, "No one wants get a letter being told they are obese. That's a very strong, uncomfortable word and we just didn't see it fitting with our son. He's very active, he's very strong."
The state is also sending letters home to students who are underweight.
Parents can choose to keep their child from being screened for body mass index.
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