THE EMPIRES STRIKE BACK: With little startups nipping at their heels, education companies are well aware of that their business models and products are under attack. One way to stay ahead of the game, of course, is to gobble them up. (And in many cases, getting acquired is still one of the most plausible exit strategies for edtech startups.) CB Insights released a top 10 list of edtech's most active corporate acquirers and investors from 2010 to 2013. No surprises, Pearson tops the list with 15 deals (12 acquisitions and 3 investments), more than double the next company on the list, Blackboard (with 7 acquisitions.)