My google search uses the default settings ("moderate" not "strict") and I can't find anything "inappropriate" by googling beavers. So I don't see what this teacher's done wrong, personally. Would you want her to avoid every word that has ever been part of a double entendre? Or did you mean that you don't think it's appropriate for a 2nd grader to be doing internet research at all?

Email: my username, followed by 2, at google's mail