Results of a research about statistical reasoning that six high school teachers developed in a computer environment are presented in this article. A sequence of three activities with the support of software Fathom was...Results of a research about statistical reasoning that six high school teachers developed in a computer environment are presented in this article. A sequence of three activities with the support of software Fathom was presented to the teachers in a course to investigate about the reasoning that teachers develop about the data analysis, particularly about the distribution concept, that involves important concepts such as averages, variability and graphics representations. The design of the activities was planned so that the teachers analyzed quantitative variables separately first, and later made an analysis of a qualitative variable versus a quantitative variable with the objective of establishing comparisons between distributions and use concepts as averages, variability, shape and outliers. The instructions in each activity indicated to the teachers to use all the resources of the software that were necessary to make the complete analysis and respond to certain questions that pretended to capture the type of representations they used to answer. The results indicate that despite the abundance of representations provided by the software, teachers focu,; on the calculation of averages to describe and compare distributions, rather than on the important properties of data such as variability, ：shape and outliers. Many teachers were able to build interesting graphs reflecting important properties of the data, but cannot use them 1：o support data analysis. Hence, it is necessary to extend the teachers＇ understanding on data analysis so they can take advantage of the cognitive potential that computer tools to offer.展开更多
在社会迅速发展的今天,我国的经济有了更加广泛的发展,地理信息系统(Geographic Information System,GIS)正由传统GIS向信息化发展。近代地理学是将传统地理学与近代地理学有机融合而成的一门综合性学科,它是以网络技术为主要研究对象...在社会迅速发展的今天,我国的经济有了更加广泛的发展,地理信息系统(Geographic Information System,GIS)正由传统GIS向信息化发展。近代地理学是将传统地理学与近代地理学有机融合而成的一门综合性学科,它是以网络技术为主要研究对象的综合学科。基于计算机地理信息技术构建的地质环境信息管理系统,其应用范围和内容涵盖了地层岩性、区域构造、水文气、自然地理以及水文条件等多个方面。同时,系统可全面管理地质环境信息数据。文章着重探讨了GIS技术在地质环境信息管理中的实际应用。展开更多
文摘Results of a research about statistical reasoning that six high school teachers developed in a computer environment are presented in this article. A sequence of three activities with the support of software Fathom was presented to the teachers in a course to investigate about the reasoning that teachers develop about the data analysis, particularly about the distribution concept, that involves important concepts such as averages, variability and graphics representations. The design of the activities was planned so that the teachers analyzed quantitative variables separately first, and later made an analysis of a qualitative variable versus a quantitative variable with the objective of establishing comparisons between distributions and use concepts as averages, variability, shape and outliers. The instructions in each activity indicated to the teachers to use all the resources of the software that were necessary to make the complete analysis and respond to certain questions that pretended to capture the type of representations they used to answer. The results indicate that despite the abundance of representations provided by the software, teachers focu,; on the calculation of averages to describe and compare distributions, rather than on the important properties of data such as variability, ：shape and outliers. Many teachers were able to build interesting graphs reflecting important properties of the data, but cannot use them 1：o support data analysis. Hence, it is necessary to extend the teachers＇ understanding on data analysis so they can take advantage of the cognitive potential that computer tools to offer.
文摘在社会迅速发展的今天,我国的经济有了更加广泛的发展,地理信息系统(Geographic Information System,GIS)正由传统GIS向信息化发展。近代地理学是将传统地理学与近代地理学有机融合而成的一门综合性学科,它是以网络技术为主要研究对象的综合学科。基于计算机地理信息技术构建的地质环境信息管理系统,其应用范围和内容涵盖了地层岩性、区域构造、水文气、自然地理以及水文条件等多个方面。同时,系统可全面管理地质环境信息数据。文章着重探讨了GIS技术在地质环境信息管理中的实际应用。
