When an English teacher complained that her teenage son was lazy, Clare (not her real name) knew something was off.

“She told me he was bright but lazy. And then I thought about it. Why weren’t his other teachers saying the same thing.”

Clare wondered, not for the first time, if her high achieving son was dyslexic. “The teacher rang me back to say she’d looked at his work and he definitely wasn’t. I almost laughed. How could she judge without a proper assessment?”

Read the piece on The Telegraph's website.