. "KR - Korejsk\u00E1 republika" . . "0771-100X" . "Novotn\u00E1, Jarmila" . . "What is the Price of Topaze?" . . "[7147A4C392B4]" . "What is the Price of Topaze?"@en . . . . . "Environmental effects on learning mathematics are e.g. explained using Brousseau?s concept of didactical contract presented in the 1980s. The interplay of relationships and constraints between the teacher and students may produce certain unwanted effects and developments that can be observed (e.g. the Topaze effect, the Jourdain effect, metacognitive shift, the improper use of analogy) (Brousseau, 1997). The purpose of this study was to identify the episodes in which Topaze effect was found and classify the types of Topaze effect and its impact."@en . "Environmental effects on learning mathematics are e.g. explained using Brousseau?s concept of didactical contract presented in the 1980s. The interplay of relationships and constraints between the teacher and students may produce certain unwanted effects and developments that can be observed (e.g. the Topaze effect, the Jourdain effect, metacognitive shift, the improper use of analogy) (Brousseau, 1997). The purpose of this study was to identify the episodes in which Topaze effect was found and classify the types of Topaze effect and its impact." . "12410" . "summer" . "What is the Price of Topaze?" . "Ho\u0161pesov\u00E1, Alena" . "linear equations; didactical contract"@en . "1"^^ . . . "2"^^ . "8"^^ . "What is the Price of Topaze?"@en . . "4" . "RIV/60076658:12410/07:00008118!RIV12-GA0-12410___" . "000267591700004" . . . "461239" . "P(GA406/05/2444)" . "RIV/60076658:12410/07:00008118" . "Proceedings of the 31st Conference of the International Group for the Psychology of Mathematics Education" . .