The often called silver peroxide and silver(II) oxide, AgO or Ag[subscript 2]O[subscript 2], is actually a mixed oxidation state silver(I,III) oxide. A thermochemical cycle, with lattice energies calculated within the "volume-based" thermodynamic approach, explain why the silver(I,III) oxide is more stable than the hypothetical silver(II) oxide.…

This study aims to investigate a construct of reading comprehension of geometry proof (RCGP). The research aims to investigate (a) the facets composing RCGP, and (b) the structure of these facets. Firstly, we conceptualize this construct with relevant literature and on the basis of the discrimination between the logical and the epistemic meanings…

This article presents the authors' personal accounts and their experiences in working on mathematics using "arms." "Arms" is an idea that first appeared as a program written by John Warwick and David Wooldridge in an ATM publication "Some Lessons in Mathematics with a Microcomputer," 1983. The introduction to…

PRESENTED IS A FUSED COURSE IN PLANE, SOLID, AND COORDINATE GEOMETRY. ELEMENTARY SET THEORY, LOGIC, AND THE PRINCIPLE OF SEPARATION PROVIDE UNIFYING THREADS THROUGHOUT THE TEXT. THE TWO CURRICULUM GUIDES HAVE BEEN PREPARED FOR USE WITH TWO DIFFERENT TEXTS. EITHER CURRICULUM GUIDE MAY BE USED DEPENDING UPON THE CHOICE OF THE TEACHER AND THE NEEDS…

This study describes how two 10th grade teachers designed a cross-disciplinary unit, using PBL instruction as a tool for helping students create a valid and convincing argument in their math class. The five week PBL unit focused around American Studies/English and geometry content. In order to measure the rigor and relevance of the unit, multiple…

This paper examines how mathematical understandings might emerge through student-centred inquiry. Data is drawn from a research project on student-centred curriculum integration (CI) that situated mathematics within authentic problem-solving contexts and involved students in collaboratively constructed curriculum. Participatory action research…

The researchers examined the use of video modeling by means of a handheld computer as an alternative instructional delivery system for learning basic geometry skills. Three high school students with learning disabilities participated in this study. Through video modeling, teacher-developed video clips showing step-by-step problem solving processes…

Data on public secondary schools in Arkansas were gathered for two separate school years, 2005-2006 (N = 278) and 2006-2007 (N = 279), to determine if there was an association between athletic expenditures and student academic achievement. Prior to this research, there was little empirical evidence demonstrating any effect that athletic spending…

A computational experiment aimed to create and systematically analyze models of simple cation hydrates is presented. The changes in the structure (bond distances and angles) and the electronic density distribution of the solvent and the thermodynamic parameters of the hydration process are calculated and compared with the experimental data. The…

In this article, the author describes an activity she has used with two different groups: (1) high attaining year 8 children; and (2) Secondary Mathematics PGCE students. In the activity they created what was, ostensibly, the same geometrical objects using paper folding, pencil, ruler and compasses, and the "Geometer's Sketchpad"--an example of…

Padula, J. (2005) described how mathematics teachers can channel the passion of students interested in electronic music by teaching the mathematics that has been used to create it. She hypothesised that the study and enjoyment of music may help the study of mathematics since both mathematics and music are symbol systems and pattern (and its…

This study uses classroom videotapes to examine the phenomenon of students who are left behind during whole-class teaching. Zooming in via these videos enabled us to analyze these classroom situations by means of a compact, multi-perspective set of theories--van Hiele theory, conceptualization, and visual perception. The analysis provided a…

The purpose of this study is to examine the differences in achievement on the end of course assessment in Geometry and the Grade 11 Literacy exam administered to students in Arkansas during the 2005-2006 and 2006-2007 school years. The three main types of scheduling are the traditional schedule with seven or eight periods; the A/B, or the…