初中代数入门教学值得注意的问题     

马红梅 《玉溪师范学院学报》2001,17(Z1):329-330

要使新生尽快适应初中阶段的学习,必须从数的概念和具体显现形式的多样性、初中与小学数学内容之间的联系等方面,注重入门阶段的学习,同时,还要运用直观教学,创设情景,趣引新知识,灵活运用多种教法,尽快促使学生实现学习方式的和观念的转变.  相似文献   

Assessing School Readiness: Validity and Bias in Preschool and Kindergarten Teachers' Ratings     

Andrew J. Mashburn  Gary T. Henry 《Educational Measurement》2004,23(4):16-30

As a part of efforts to evaluate and monitor the increasing public investment in early childhood education, teachers are being asked to assess children's school readiness. In this study, preschool teachers and kindergarten teachers rated children's skills in three areas (kindergarten readiness, academic skills, and communication skills), and these ratings were compared with direct assessments of the children's skills. Ratings by both groups of teachers tended to be more highly related to basic skills, such as counting and number naming, than to abilities such as solving applied problems and using expressive and receptive vocabulary. Preschool teachers' ratings had a lower association with children's observed skills and abilities than kindergarten teachers' ratings. Ratings of children attending Head Start were systematically inflated, but this relationship was mediated to a significant extent by the teachers' levels of education. More educated teachers rated children in a manner consistent with the children's directly assessed skills. Implications of these findings for informing future efforts to assess school readiness by using teacher ratings are discussed.  相似文献   

再论竞技状态   总被引：3，自引：1，他引：2  

罗平 《上海体育学院学报》1994,18(4):11-15

现代竞技运动由平时运动训练、赛前直接准备和运动竞赛三个相对独立而又相互联系的过程组成.竞技状态是生物能量转换范畴内联系竞技运动三个组成部分的纽带.它的实质是运动员在训练中积累的生物能量到竞赛释放的过程中所表现出的暂时性状态。  相似文献   

The Issue of Range Restriction in Bookmark Standard Setting          下载免费PDF全文

Adam E. Wyse 《Educational Measurement》2015,34(2):47-54

This article uses data from a large‐scale assessment program to illustrate the potential issue of range restriction with the Bookmark method in the context of trying to set cut scores to closely align with a set of college and career readiness benchmarks. Analyses indicated that range restriction issues existed across different response probability (RP) values and item response theory (IRT) models if one were to apply the Bookmark procedure using intact test forms. Results also suggested that range restriction may still be present if one had access to additional data from an item bank. This demonstration critically highlights challenges that may exist in some practical applications of the Bookmark method due items not being designed to cover the full range of examinee abilities.  相似文献   

跨学科类比法在线性代数教学中的应用     

罗兰兰 《四川教育学院学报》2011,27(1):119-121

针对线性代数教学的抽象与沉闷的现状,结合当前大学生的时代特性与兴趣特性,文章将以一个教学实例为对象,尝试使用跨学科类比法,并以此为突破口,试图探索生活化的＂去数学化＂的新型教学。  相似文献   

Global dimension of weak smash product     

JIA Ling LI Fang 《浙江大学学报(A卷英文版)》2006,7(12):2088-2092

INTRODUCTION In (Auslander, 1995), the author established the relationship of homological dimension between skew group algebra ΛG and Λ. Recall from Corollary 4.7 and Corollary 4.10 in (Auslander, 1995) that gl.dim(ΛG)=gl.dim(Λ) where ΛG is a skew group algebra with the order of G invertible in Λ. Recently, more and more mathematicians have studied homological dimension for Hopf algebra. Yang (2002) gave the relationship of homological dimension between smash product algebra A#H…  相似文献   

工科《线性代数》总复习框架   总被引：2，自引：0，他引：2  

胡康秀  王兵贤 《牡丹江教育学院学报》2007,(3):126-127

将工科《线性代数》中所涉及到的知识点用一条脉络串起来,各个知识点之间的相互关系清晰明了,同时也将《线性代数》这门课程要求学生掌握的知识体系体现出来.  相似文献   

二进数布尔代数的几个应用结果     

吕瑞芳  蒋忠樟 《金华职业技术学院学报》2002,2(1):39-40,43

本文讨论了二进数所成的布尔代数以及它与X幂集P(X)所成的布尔代数之间的同构关系，利用其解决关于子集的交集、并集的计数问题，关于交错k-子集的计数问题和关于交错R-子集的计数定理。  相似文献   

关于R0代数的布尔元     

王保社 《咸阳师范学院学报》2004,19(4):11-13

研究了每一个元都是布尔元的R0代数，用等式刻划了其特征，证明了如下结果：R0代数M的每一个元都是布尔元的充要条件是M为布尔代数。并给出一个反例说明：R0代数的所有布尔元一般不能构成MP滤子。  相似文献   

用直接代数法研究一些特殊非线性系统的行波激发模式     

叶健芬  任清褒 《丽水学院学报》2005,27(5):42-45

运用直接代数法研究一些特殊非线性系统:sine-Gordon系统和Bullough-Mikhailov系统的行波激发模式,得到了上述系统的孤波解、周期波解和双周期波解。  相似文献