Free game mode

Cobalt's Factory

Brock: Cobalt

Answer questions to build and upgrade machines in a factory that keeps producing.

How it plays

Correct answers earn machine choices. Production and accuracy remain separate.

Classroom format

Independent classroom factories. The teacher chooses a study set; students join a classroom room by code. Students do not need a paid subscription.

A reason to try it

Correct answers earn game choices in Cobalt’s game. Game points and answer accuracy are shown separately.

Free to host for authenticated teachers with access to a study set. These 16 modes do not require Pro or use the ordinary monthly creation allowance. Room validation and technical protections still apply.

Sign in as a teacher, then choose your question set. Room-end learning results follow the current room policy; report archives and exports have separate access rules.