Germany-based media company Bertelsmann and the university venturing fund it recently backed have joined venture firms Kapor Capital, Novak Biddle Venture Partners and Greylock Partners backing the on-line university network.
Academic research into behavioual science informs new wave of service entrepreneurs.
Paul Musselman, formerly of Intel Capital and IBM's corporate development team, takes the top role at the language learning start-up, which spun off from Carnegie Mellon University.
US-based internet university company Coursera nets the funds from venture firms, as it signs up top US universities like Princeton and Stanford offering courses for free.
University of Manchester spin-out Arvia Technology, which treats organic liquid waste, has raised money from prior backer MTI, as well as investors Sustainable Technology Investors and Park Walk Advisors.