You know your child has more potential, So why is school such a struggle?

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The teachers say he’s just not trying, he’s daydreaming, or just not doing his work. He spends hours each night on homework, and still brings home Cs, Ds, and Fs.

Is it a learning disability? Could it be?
Wikipedia says: “In the United States and Canada, the terms learning disability, learning disabilities, and learning disorders (LD) refer [...]