Same writing book: now I've come across a sentence that says, "He outshined all his teammates."
Oxford English Dictionary: past tense of "outshine" is "outshone."
With writing curriculum like this, who needs illiterate barbarians? Once more, I've wasted my money.
Come on, Kumon! Somehow, the dazed, wall-eyed, not-quite-happy face in their logo says it all...