1. Policy statement: children, adolescents, and television;American Academy of Pediatrics;Pediatrics,2001
2. Babies and toddlers should learn from play, not screens;American Academy of Pediatrics,2011
3. Low wages = low quality: Solving the real preschool teacher crisis;Barnett,2003
4. Beyond technology: Children's learning in the age of digital culture;Buckingham,2007
5. Teachers: beliefs and knowledge;Calderhead,1996