Renaissance Learning: Still in play. Plato Learning has made an unsolicited bid of $15.50 a share cash for Renaissance (RLRN.O), topping a previous offer by private equity firm, Permira, which offered $14.85 a share. Among Renaissance's products: Accelerated Reader and Accelerated Math, along with Star Assessments. Street whispers suggest Permira may still prevail. This Tuesday, the stock closed at $15.56 a share.