id: 06082416
dt: j
an: 2012e.00216
au: da Silva, Cláudia Borim; Kataoka, Verônica Yumi; Cazorla, Irene Maurício
ti: Language, strategy and reasoning’s level of variation of secondary
    students. (Linguagem, estratégia e nível de raciocínio de variação
    dos alunos do ensino fundamental II.)
so: Bolema 24, No. 39, 515-536 (2011).
py: 2011
pu: Universidade Estadual Paulista de Mesquita Filho, UNESP, Rio Claro
la: PT
cc: C30 K60
ut: non-conventional language of variation; variation’s strategy;
    variation’s reasoning levels; SOLO taxonomy
ci: 
li: 
ab: Summary: This study explored language, strategy and level of reasoning
    regarding variation with twenty-five eighth and ninth graders while
    they solved three tasks, using their anthropometric measures.
    Students’ answers were categorized using content analysis and SOLO
    taxonomy. There was an increase in the quantity and quality of
    variation terms during the development of the tasks. The strategy that
    increased in frequency during the tasks was modal clump, an important
    strategy to promote intuitive notions of distribution density. Higher
    levels of reasoning about variation were observed, indicating that
    students appropriated new tools for analyzing variation. In light of
    the contributions observed from using dot plots and box plot for
    developing variation reasoning, additional activities should be
    developed with these tools to evaluate their effectiveness for building
    the interquartile range concept.
rv: