[{"user_id": 21310, "stars": [], "topic_id": 19313, "date_created": 1302737299.7324531, "message": "ScienceBlogs.com and DonorsChoose.org are advertising a hacking challenge to\"make discoveries and build apps that improve education in America\". The prizes are definitely worth taking a look. http://www.donorschoose.org/hacking-education", "group_id": 6727, "id": 673682}, {"user_id": 8649, "stars": [], "topic_id": 19313, "date_created": 1302900815.3930581, "message": "Of course, one can't talk about hacking challenges without bringing up Kaggle: http://www.kaggle.com/", "group_id": 6727, "id": 705244}]