Edmodo has raised $30m in series D funding from investors including KDDI's Open Innovation Fund for its social network for teachers and education app marketplace.

Edmodo, a US-based communication service for teachers, has raised $30m in a series D round that featured participation from Japan-based telecommunications group KDDI through its Open Innovation Fund.

Venture Capital firm Index Ventures led the round.

The KDDI Open Innovation Fund is managed by venture capital firm Global Brain and invests in Japan-based and foreign companies.

Edmodo enables school classes to connect and collaborate. It also operates a third-party marketplace where developers can advertise their education apps on the Edmodo…