Cunningham
From Tardis Wiki, the free Doctor Who reference
Mr Cunningham was a teacher at Park Vale School.
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As a teacher, he did not have much discipline and let havoc rule the class. (SJA: The Day of the Clown) He also ran a form of detention and and gave advice for seemed sadly depressed Jacob. After Steve Wallace joked about Jacob he turned around and took Mr. Cunningham's voice. When Jacob let go of the Berserker Pendant he got his voice back and ran out the class with Steve Wallace and the other students in detention (SJA: The Mark of the Berserker)