Norwegian game-based learning platform Kahoot! announced that the company will purchase DragonBox, a math apps developer.

The transaction will strengthen Kahoot!’s platform with the DragonBox math learning apps, community and school curriculum.

The acquisition, expected to close by June, was worth $18 million in a combination of cash and shares. The move will also extend Kahoot!’s offerings and bring DragonBox to a wider audience

Kahoot!, which in 2018 booked $1.9 million in revenue, has raised a total of $63 million in investment capital to date.