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Beaver (Jerry Mathers) is "a-scared" about the I.Q. test that is soon to be taken in his school. It's bad enough that Wally (Tony Dow) has always seemed so much brighter than Beaver. But the worst may still come -- suppose Beav's friends are right? Suppose that, if he posts a low score, he will be shipped off to a "dumb" school? Well, without giving any more of the story away, it can be noted that the ending of this remarkably non-PC episode is a real eye-opener, not only for the Beav but for everyone in his orbit.