, Concept Learning in Preschool Children: Effects of a Short-Term Logo Experience, Effects of Logo Experience and Grade on Concept Learning and Creativity, pp.199-205, 1986.
DOI : 10.2190/RH2K-4AQ7-2598-TVEA
, Computers and Young Children, ERIC Clearinghouse on Elementary and Early Childhood Education, 2000.
DOI : 10.1007/bf02361381
, Back to the Future: The Story of Squeak, A Practical Smalltalk Written in Itself, Proceedings of the 1997 ACM SIGPLAN Conference on Object-Oriented Programming Systems, Languages & Applications (OOPSLA'97), 1997.
, ToonTalkTM???An Animated Programming Environment for Children, Abbreviated version in Proceedings of the National Educational Computing Conference, pp.197-217, 1995.
DOI : 10.1006/jvlc.1996.0011
, The use of computers in kindergarten, with or without adult mediation; effects on children's cognitive performance and behavior, Computers in Human Behavior, vol.16, issue.6, pp.591-608, 2000.
DOI : 10.1016/S0747-5632(00)00027-3
, Orientações Curriculares para a Educação Pré-Escolar. (English translation included in: Ministério da Educação, Early Childhood Education in Portugal, 1997.
, Early Childhood Education and Care Policy in Portugal, M00020278.pdf and M00020280.pdf, 1999.
, Working in ToonTalk with 4-and 5-year olds, presentation at the "Playground -novos ambientes de aprendizagem" Seminar, Porto, Portugal, organized by CnotInfor. An edited version was accepted for publication at the e-Society, IADIS International Conference, 2001.
, Technology in Schools: To support the system or render it obsolete, Milken Exchange on Education Technology, 1998.
, Making Programming Easier for Children The Design of Children's Technology, 1999.