A study was conducted for creating digital classrooms to support students to learn subject knowledge and develop information literacy competency as well as critical thinking skills. A total of 144 students in four Secondary 1 classes in a secondary school in Hong Kong were invited to participate in the study. In the 12 trial lessons, every three students shared a Tablet PC for learning the topic “Air Pollution Problems in Hong Kong” in the Integrated Humanities subject. After the trial teaching, the students and teachers were interviewed about their perception of the support from the designed digital classrooms. The study found that the students and teachers positively perceived the support from the designed digital classrooms on developing subject knowledge, information literacy competency and critical thinking skills. Three recommendations are made for enhancing the pedagogical designs in digital classrooms that emphasize the use of mobile technology. Copyright © 2012 Asia-Pacific Society for Computers in Education.