References of "Vlassis, Joëlle 50003273"
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See detailUsing mathematical symbols at the beginning of the arithmetical and algebraic learning
Fagnant, Annick; Vlassis, Joëlle UL; Crahay, Marcel

in Powerful environments for promoting deep conceptual and strategic learning (2005)

Detailed reference viewed: 37 (3 UL)
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See detailEtude de l'utilisation du signe négatif dans les opérations algébriques élémentaires
Vlassis, Joëlle UL

in Crahay, Marcel; Verschaffel, Lieven; De Corte, Erik (Eds.) et al Enseignement et apprentissage des mathématiques : Que disent les recherches psychopédagogiques? (2005)

Detailed reference viewed: 42 (0 UL)
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See detailMaking sense of the minus sign or becoming flexible in “negativity”
Vlassis, Joëlle UL

in Learning and Instruction (2004)

Detailed reference viewed: 121 (1 UL)
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See detailHow to develop the use of mathematical symbols at the beginning og the arithmetical and algebraic learning?
Fagnant, Annick; Vlassis, Joëlle UL; Crahay, Marcel

Scientific Conference (2004)

Detailed reference viewed: 31 (0 UL)
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See detailCartable vert et poids plume. Quelles sont les représentations mentales et les habitudes des élèves en matière d’environnement ?
Vlassis, Joëlle UL; de Landsheere, Viviane; Crahay, Marcel

in Informations Pédagogiques (2004), 56

Detailed reference viewed: 29 (0 UL)
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See detailLa respiration : Comparaison entre les représentations des élèves et l’évolution historique du concept
Flammang, Cécile; Vlassis, Joëlle UL; Crahay, Marcel

in Informations Pédagogiques (2004), 55

Detailed reference viewed: 95 (0 UL)
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See detailL'enseignement des sciences par énigmes scientifiques. Les enseignants se posent des questions
Vlassis, Joëlle UL; De Landsheere, Viviane; Mélon, Christophe

in Informations Pédagogiques (2003), 53

Detailed reference viewed: 42 (0 UL)
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See detailAbout the flexibility of the minus sign in solving equations
Vlassis, Joëlle UL

in Proceedings of the 26th International conferecne for the Psychology of M athematics Education (PME 26) (2002)

Detailed reference viewed: 120 (0 UL)
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See detailThe balance model : Hindrance or support for the solving of linear equations with one unknown
Vlassis, Joëlle UL

in Educational Studies in Mathematics (2002)

Detailed reference viewed: 104 (0 UL)
See detailL'algèbre par des situations problèmes au début du secondaire
Vlassis, Joëlle UL; Demonty, Isabelle

Book published by de boeck (2002)

Detailed reference viewed: 110 (2 UL)
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See detailSolving equations with negatives or crossing the formalizing gap
Vlassis, Joëlle UL

in Vlassis, Joëlle (Ed.) Proceedings of the 25th International conference for the Psychology of M athematics Education (PME 25) (2001)

Detailed reference viewed: 126 (5 UL)
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See detailLes situations-problèmes, plus qu’une méthode à la mode
Vlassis, Joëlle UL

in Informations Pédagogiques (2001), 52

Detailed reference viewed: 88 (3 UL)
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See detailL'approche de l'algèbre par la généralisation : un exemple de séquence d'apprentissage.
Vlassis, Joëlle UL

in Actes du 50e colloque de la Commission Internationale pour l'Etude et l'Amélioration de l'Enseignement des Mathématiques (CIEAEM) (1999)

Detailed reference viewed: 46 (0 UL)
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See detailLes représentations pré-algébriques des élèves sortant de l'enseignement primaire
DEMONTY, I; Vlassis, Joëlle UL

in Informations Pédagogiques (1999), 47

Detailed reference viewed: 48 (0 UL)
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See detailProcessus de raisonnement et enseignement de l’algèbre au premier degré du secondaire
Vlassis, Joëlle UL; DEMONTY, I

in Informations Pédagogiques (1997), 38

Detailed reference viewed: 54 (1 UL)