Production d'exemples et de contre-exemples en analyse: étude de cas en première d'université

The history of mathematics shows that counter-examples have played a substantial role in the development of functional concepts. We undertook a long-term study about the construction of examples and counter-examples in a college level calculus course. The subjects were three pairs of first year students majoring in mathematics/physics at the University of Fes (Morocco). In addition to the instructional role of constructing examples and counter-examples, our research addressed the students' thought processes. For this propose, their interactions, as well as all their verbal and written productions were collected and transcribed. Each sentence was then classified according to the four qualitative variables: Activity, Expression, Content and Correctness. A factor analysis put in evidence two types of strategies that we interpreted as global and local ones. In addition, a qualitative analysis allowed us to distinguish between `winning' and `losing' strategies.     

Historical argument writing: the role of interpretive work,argument type,and classroom instruction

Reading and Writing - This study examines whether and how five novice history teachers incorporated writing into their instruction. We analyzed observations, student writing, teacher feedback and...     

试论包装设计对消费者行为的影响

在产品高速更新换代的市场模式下,如何才能提高产品的购买率,这是很多企业需要考虑的问题。产品的包装设计对于该产品能否在众多品种中脱颖而出就起着至关重要的作用。包装设计是提高购买率的重要途径之一,也是迎合消费者品味的最行之有效的方法。产品的包装设计能在很大程度上影响或制约着消费者的购买心理及购买行为,他们会优先根据对包装的喜好来挑选商品。别出心裁的包装设计登上了新的舞台,成为企业、消费者和包装设计师们共同关注的一种发展趋势。引人注目的包装设计能够提高产品的购买率从而提高企业的利润。了解消费者的消费心理和消费行为也有利于改进包装设计。     

浅谈唐朝在西域实行屯田戍边措施以及对经济发展的意义

唐朝政府在西域实行了屯田戍边一系列措施,这是古代西域农业经济发展史上的一项重要举措,对西城社会经济发展有着非常重要的作用。