Portland OR-based OpenSesame says in a news release that it plans to use some of the proceeds from the Series C round to offer more courses and fund sales and marketing of its products. Altos Ventures, which led OpenSesame’s previous $9 million funding round three years ago, was the only other participating investor named in the news release. Other education technology companies that have raised large venture capital rounds in recent years include Coursera, Seattle-based DreamBox, and Boston’s Examity. OpenSesame’s roster of clients includes Toshiba Global Commerce and EnerSys (NYSE: ENS), a Pennsylvania battery manufacturer. “Enterprises spend over $30 billion annually on external learning content and programs to maintain a highly skilled, competitive workforce,” Chris Winship, partner at FTV Capital, says in a prepared statement.