Worthy of noting: when Arthur's Teacher Trouble, a book first published in 1986, was adapted a decade later for the Arthur PBS animated television series, it was broken up into two halves of the same episode: "Arthur and the Real Mr. Ratburn" and "Arthur's Spelling Trubble". I think it works better as separate stories. Arthur and his friends are overwhelmed after their first day in Room 13 with their new schoolteacher, Mr. Ratburn. He's a tough teacher, but his students—who work harder than any others—have a decided advantage in the upcoming all-school spellathon. Arthur, the Brain, Muffy, and Francine each want to win this year's trophy for themselves.
Despite other class assignments, and occasional annoyances at home courtesy of his little sister D.W., Arthur squeezes in enough studying to qualify as one of Mr. Ratburn's two representatives to the spellathon. In the weeks before the big event, Arthur hunkers down for some serious study sessions. He isn't a bad student, but does he have any chance of winning a spelling contest versus the Brain? Or how about Prunella, a kid from Mr. Ratburn's class last year and defending spellathon champion? It will take an evening of prolonged excellence—and a bit of luck—for Arthur to walk away with the trophy.
I could rate Arthur's Teacher Trouble two stars, but I'll go one and a half. The book isn't as entertaining as either episode of the PBS series based on it, and the themes are weaker. For example, "Arthur's Spelling Trubble" ties his spellathon success to the hard work Mr. Ratburn imposes on his class; academic accomplishment requires the sort of personal sacrifice Mr. Ratburn asks of his kids on a routine basis. The television episode clearly contrasts this with Miss Sweetwater and Mrs. Fink's classes; their kids have more free time and fun, but will never win an academic contest against a student of Mr. Ratburn's. I love Marc Brown's Arthur Adventure books, but in this particular case, you're better off turning to the television screen.