A mother is mad after her daughter came home from Hillcrest Elementary School with a note saying that her body mass index was too high despite her lean frame.

"She goes, 'Does this mean I'm fat?' and I said, 'No, this does not mean you are fat,'" said Amanda Moss, the second grader's mother.

Moss's daughter Kylee is 7-years-old, 54 pounds, 3' 10'. According to the BMI calculator on the Centers for Disease Control and Prevention's website, her BMI is 17.9, making her overweight. But Moss says Kylee is an active, thin second grader.

"She is tiny," her mom said. "She has no body fat at all."

The school calculated students body mass indexes, which are a measurement of height, weight and age, as part of a grant program, Belton School District, Missouri.

The Superintendent Andrew Underwood says that in the future, parents will be allowed to opt out of the test.

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