DeVry's fourth-quarter earnings show again that education can be exciting. Shares of DeVry (DV), the for-profit educator known for its TV ads touting former-student success stories, gapped up 20% Thursday in well-above-average trading volume after second-quarter earnings beat estimates and the company said it has a bullish outlook. DeVry's earnings per share dipped 5% from last year to 87 cents, but that trounced consensus for 56 cents. Revenue