Microsoft Ventures, which participated in the round's $10m first tranche in September, has returned to contribute to a $10m extension.

Norway-based educational game developer Kahoot doubled a series A round featuring software provider Microsoft’s corporate venturing unit Microsoft Ventures to $20m yesterday.

The $10m extension was led by undisclosed, Norway-based private investors, and included Microsoft Ventures, Northzone and Creandum, the three participants in the $10m first tranche of the round in September 2016. Kahoot has now raised $26.5m in total.

Founded in 2013, Kahoot is the creator of a game-based platform that helps children learn socially. It has 50…