共查询到20条相似文献，搜索用时 109 毫秒
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在执教苏教版四年级课标教材"用计算器计算"这一内容时,我选择了6道题让学生辨析怎样的题该用计算器计算,目的是让学生学会根据题目特点,有选择地使用计算器,以防止出现盲从计算器的倾向.学生对计算器有了初步认识,并用计算器解决了3道复杂的计算题后,都一致认同用计算器计算又迅速又准确.在他们即将对计算 相似文献
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《用计算器计算》是苏教版小学数学第七册的内容,下面是笔者对第100-101页的内容的两次试教过程与思考。一、第一次试教1.确定如下教学目标(1)使学生初步认识计算器,了解计算器的基本功能。(2)会使用计算器进行大数目的计算。(2)通过计算探索与发现一些简单的数学规律。(4)使学生体验用计算器进行计算的优点。2.初步研究教材后,我设计了本课教学的基本流程(1)认识计算器。 相似文献
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教学目标 会由已知锐角求它的三角函数值;会由已知三角函数值求它对应的锐角. 教学重点 已知锐角用计算器求它的三角函数值及已知三角函数值用计算器求它对应的锐角. 教学难点 对用计算器求出的三角函数值取近似值,已知三角函数值(特别是余切)用计算器求它对应的锐角. 相似文献
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苗学军 《数理天地(初中版)》2003,(11)
新颁布的课程标准中,对计算器的使用做出如下要求:“在课堂教学、课外作业、实践活动以及考试中,应当允许学生使用计算器,还应鼓励学生用计算器进行探索规律等活动.”作为一种导向,笔者惊喜地发现,在03年各地的中考试卷中,出现了明确要求使用计算器的题目,此举受到学生的普遍欢迎。 相似文献
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[教学内容] 义务教育课程标准实验教科书苏教版四年级《数学·上册》第100～101页"用计算器计算". [预设目标] 1.使学生初步认识计算器,了解计算器的基本功能,会使用计算器进行大数目的计算,并通过计算探索与发现一些简单的数学规律,解决一些简单的实际问题. 相似文献
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【教学内容】苏教版四年级上册第100~101页。【教学过程】一、熟悉计算器师:同学们,星期天老师去买了一些东西,拍了几张照片。我们一起来看一看。观察一下,他们在用什么计算?(计算器)知道他们为什么用计算器算吗?(方便)。计算器方便快捷,生活中常常会用到它。今天这节课我们就来研究用计算器计算。 相似文献
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教材体系
<用计算器计算>是苏教版教材四年级上册第十一单元的内容.<数学课程标准>将用计算器计算安排在第二学段"数与代数"领域"数的运算"的知识体系中,具体目标是:能借助计算器进行较复杂的运算,解决简单的实际问题,探索简单的数学规律. 相似文献
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《教育实用测度》2013,26(1):59-72
Test makers are struggling with the issue of whether to provide a standard calculator for all participants or allow students to bring in their own calculators. A within-subjects design was used to examine (a) effects of calculator type (own calculator vs. standard calculator) on student performance and (b) differential impacts of calculator type for children from a variety of backgrounds. Fifty Grade 8 students completed a set of National Assessment of Educational Progress problems and a set of timed computation tests with their own calculators and comparable sets of problems with a standard calculator. Performance on mathematical items (i.e., time, accuracy) and the ways in which students used the calculators (e.g., number of keys pressed, calculator difficulties) were not affected by calculator type. No performance advantages associated with calculator type were related to student background characteristics (e.g., socioeconomic status, ethnicity, sex, math ability). However, calculator preference depended on the complexity of the student's own calculator relative to the standard one. 相似文献
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要确保计算机教学的质量,就必须对计算机实验室的系统进行有效维护,保持计算机实验室良好的运行状况。本文介绍了计算机实验室系统的几种维护方法,以及这几种方法的优缺点。 相似文献
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《教育实用测度》2013,26(4):303-320
Calculator effects were examined using methods taken from research on differential item functioning. Use of a calculator was controlled on two experimental forms of a test assembled from operational items used on a standardized university mathematics placement test. Results indicated that calculator effects were not present based on analysis of test scores and in only two of the three subscores composed from homogeneous item types. Analyses of item-level functioning indicated, however, that a number of items, including several not included in the two significant subscore combinations, also contained calculator effects. For those items identified, use of the calculator appeared to have changed the actual objective being tested. The findings were generally consistent with previous research: Items that were easier when a calculator was used required either simple computations or use of a function key on the calculator; items that were more difficult required knowledge of a procedure either with or without additional computation. Analysis at the item level facilitated clearer understanding of the impact of calculator use on measurement of the underlying objective. 相似文献
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Roger G. Brown 《Educational Studies in Mathematics》2010,73(2):181-203
The paper reports on the introduction of the graphics calculator into three centralised examination systems, which were located
in Denmark, Victoria (Australia) and the International Baccalaureate. The introduction of the graphics calculator required
those responsible for writing examination questions to consider how to assess mathematical skills within this new environment.
This paper illustrates the types of mathematics skills that have been assessed within the graphics-calculator-assumed environment.
The analysis of the examination questions indicated that only two out of the six mathematics examinations considered demonstrated
any significant change in the types of skills assessed in conjunction with the introduction of the graphics calculator. The
results suggest that it is possible to reduce the use of questions assessing routine procedures (mechanical skills) with a
graphics calculator, but it is also evident that there have not been major changes in the way that examination questions are
written nor the mathematics skills which the questions are intended to assess. 相似文献
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This study investigates how the use of calculators during high school mathematics courses is associated with student performance in introductory college calculus courses in the USA. Data were drawn from a nationally representative sample of 7087 students enrolled in college calculus at 134 colleges and universities. They included information about students’ demographics, standardized test scores, and high school mathematics course enrollment and performance. Factor analysis reduced ten items describing high school calculator usage to two composites: how extensively calculators were employed and teacher-imposed restrictions on their use. Hierarchical linear models predicted students’ college calculus grades, reported by their professor, while controlling for differences between colleges and student backgrounds. The more extensively students had used calculators in high school, the lower their grade in college calculus. However, students earned higher college calculus grades to the extent that their high school teachers had limited calculator use on quizzes and exams and had restricted calculator use until paper-and-pencil methods had been mastered, which offset the negative association of extensive calculator use with grades. The effect sizes of both calculator composites were very small. Overall, the findings raise doubts about any substantial long-term effects on college mathematics performance of calculator use in high school. 相似文献
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This study assessed if students with and without disabilities used calculators (fourfunction, scientific, or graphing) to solve mathematics assessment problems and whether using calculators improved their performance. Participants were sixth and seventh-grade students educated with either National Science Foundation (NSF)-funded or traditional mathematics curriculum materials. Students solved multiple choice and open-ended problems based on items from the State’s released previous assessments. A linear mixed model was conducted for each grade to analyze the factors impacting students’ self-reported calculator use. Chi Square tests were also performed on both grade’s data to determine the relationship between using a calculator and correctly solving problems. Results suggested only time as a main factor impacting calculator use and students who self-reported using a calculator were more likely to answer questions correctly. The results have implications for practice given the controversy over calculator use by students both with and without disabilities. 相似文献
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周怀芬 《天津职业院校联合学报》2013,(6):112-116,128
文章提出了基于AT89S52单片机的简易计算器的实现方案,说明基于AT89S52单片机的简易计算器的基本原理。该方案简单易行,成本低,经实际系统测试,该方案能够有效提高快节奏下人们的数据计算速度。 相似文献
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关于图形计算器与高等数学教学改革的若干思考 总被引：4，自引：0，他引：4
叶立军 《宁波教育学院学报》2003,5(2):37-41
高等数学是一门基础课 ,如何提高高等数学的教学质量是广大高等数学教师关注的首要问题。TI图形计算器是一种科学的学习工具 ,使用TI图形计算器进行教学 ,在一定程度上可以提高学生学习高等数学的兴趣。学生可以利用TI图形计算器自主地学习 ,进行数学实验 ,从而提高学习高等数学的效果 相似文献
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《教育实用测度》2013,26(1):95-109
To evaluate the effects of calculator use on performance on the SAT I: Reasoning Test in Mathematics, questions about use of the calculator on the test were inserted into the answer sheets for the November 1996 and November 1997 administrations of the examination. Overall, nearly all of examinees indicated that they brought a calculator to the test and about two thirds reported using them on one third or more of the math items. Some group differences in the use of calculators were observed with girls using them more frequently than boys and Whites and Asian Americans using them more often than other racial or ethnic groups. Use of calculators was associated with higher test performance, but the more able students were more likely to have calculators and used them more often. The results were analyzed further using multiple regression and differential item functioning procedures. The degree of speededness on different degrees of calculator use was also examined. Overall, the effects of calculator use were found to be small, but detectable. 相似文献
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提高课堂效益永远是教师追求的目标.图形计算器提供了大量的数学活动线索和丰富的数学活动机会,为学生数学学习构筑了起点.对使用图形计算器学习初中数学的3名学生的跟踪研究结果表明:学习工具对学生的学习、个性培养以及教师的观念转变都产生了一定的作用.数学教学中要发挥图形计算器的功能,提高学生的动手能力,让实验数学思想落到实处. 相似文献