1. Edith Ackermann . 1991. The agency model of transactions: Toward an understanding of children’s theory of control. Psychologie genetique et sciences cognitives . Geneve : Fondation Archives Jean Piaget ( 1991 ). Edith Ackermann. 1991. The agency model of transactions: Toward an understanding of children’s theory of control. Psychologie genetique et sciences cognitives. Geneve: Fondation Archives Jean Piaget (1991).
2. Edith Ackermann . 2001. Piaget’s constructivism , Papert’s constructionism: What’s the difference. Future of learning group publication 5, 3 ( 2001 ), 438. Edith Ackermann. 2001. Piaget’s constructivism, Papert’s constructionism: What’s the difference. Future of learning group publication 5, 3 (2001), 438.
3. Edith Ackermann . 2007. Experiences of Artifacts: People’s Appropriations/Objects ’ ‘Affordances’. Keyworks in radical constructivism( 2007 ), 249–259. Edith Ackermann. 2007. Experiences of Artifacts: People’s Appropriations/Objects’ ‘Affordances’. Keyworks in radical constructivism(2007), 249–259.
4. Edith Ackermann . 2012. Perspective-taking and object construction: Two keys to learning . In Constructionism in practice . Routledge , 39–50. Edith Ackermann. 2012. Perspective-taking and object construction: Two keys to learning. In Constructionism in practice. Routledge, 39–50.
5. Edith K. Ackermann. 2004. Constructing Knowledge and Transforming the World” In Tokoro M. and Steels L. (Eds.) A Learning Zone of One’s Own. Sharing Representations and Flow in Collaborative Learning Environments. The Netherlands. Part 1(2004) 15–37. Edith K. Ackermann. 2004. Constructing Knowledge and Transforming the World” In Tokoro M. and Steels L. (Eds.) A Learning Zone of One’s Own. Sharing Representations and Flow in Collaborative Learning Environments. The Netherlands. Part 1(2004) 15–37.