Exhibit 21.1

Blackboard Inc. Subsidiaries

Entity	State/Country of Formation
Blackboard Tennessee, LLC	Delaware
Bb Acquisition Corp.	Delaware
Blackboard International Holdings Inc.	Delaware
Bb Management LLC	Delaware
Blackboard CampusWide of Texas, Inc.	Texas
Blackboard International L.P.	Bermuda
Blackboard International B.V.	Netherlands
Blackboard Japan KK	Japan
Blackboard (Beijing) Co., Ltd.	China
Blackboard (UK) Limited	United Kingdom
Blackboard Educational (Canada) Corporation	Canada
Blackboard (Australia) Pty Ltd.	Australia
Cerbibo Holding Co., Ltd.	Cayman Islands
Blackboard Czech s.r.o.	Czech Republic
Blackboard Connect Inc.	North Carolina
Blackboard Singapore Pty Limited	Singapore
CERNET-Blackboard Information Technology (Beijing) Co., Ltd	China
ANGEL Learning, Inc.	Indiana
Blackboard Collaborate Inc.	Delaware
Blackboard Collaborate Canada Inc.	Canada
Blackboard Collaborate UK Limited	United Kingdom
Blackboard Student Services Inc.	Delaware
Blackboard FZE	United Arab Emirates