Archipelago Learning Shareholders Approve Merger Agreement with PLATO® Learning

Archipelago Learning, Inc. ARCL today announced that its shareholders, at a special meeting held on May 16, 2012, approved the proposal to adopt the previously announced merger agreement, dated March 3, 2012, providing for the acquisition of Archipelago Learning by PLATO Learning. At the special meeting of shareholders, there were 22,499,664 shares voted by proxy or in person, representing 85.40% of Archipelago Learning's total outstanding shares as of the record date, April 11, 2012. With regards to the vote to approve the proposal to adopt the merger agreement, 22,499,664 shares were cast, representing 85.40% of the total outstanding shares of common stock of Archipelago Learning.