Archipelago Learning: Acquired by PLATO Learning, which will pay $11.10 per share in cash, representing an equity value of approximately $291 million. As you can learn from the EdSurge site, Archipelago Learning is a subscription-based, software-as-a-service provider that delivers standards-based content, practice, assessment and productivity tools. You'll remember that last year, PLATO Learning unsuccessfully tried to snap up Accelerated Learning. Now with Archipelago, the combined companies' customer base is estimated to comprise over 50,000 schools and 17 million students, from pre-K to adult learners. More info from PEHub. Mini empire in the making?