This paper reports on an investigation of the effectiveness an intervention using several different methods for teaching solution chemistry. The teaching strategy comprised a four-step approach derived from a constructivist view of learning. A sample consisting of 44 students (18 boys and 26 girls) was selected purposively from two different Grade…

We report on the development and use of an analytical framework designed to articulate the language demands English learners (ELs) encounter on performance assessments such as those used in inquiry-based science classrooms. The Science Assessment Language Demands (SALD) Framework, grounded in functional and interactional views of language and…

Students in 4 Canadian high school physics classes completed instructional sequences in two key physics topics related to motion--Straight Line Motion and Newton's First Law. Different sequences of laboratory investigation, teacher explanation (lecture) and the use of computer-based scientific visualizations (animations and simulations) were…

Relatively little research has explored whether schools differ in their effectiveness for different group of pupils (e.g. by ethnicity, poverty or gender), for different curriculum subjects (e.g. English, mathematics or science) or over time (different cohorts). This paper uses multilevel modelling to analyse the national test results at age 7 and…

Research suggests that language-based activities should be an integral part of science teaching and learning and that these are even more important in minority-language contexts. The present cross-case study investigates how literacy is enacted in francophone science classrooms. Three francophone teachers were observed while they taught Grade 9…

Impact on student achievement of randomly assigned students working individually or collaboratively in mixed- and matched-gender pairs at a computer on predetermined science tasks was investigated. Collaborative dyads shared a computer and screen as each operated an independent keyboard and mouse. A mixed gender control group working individually…

The purpose of this study was to determine the extent that diagrammatic literacy is necessary for success on standardized science tests at the late-elementary and middle grade levels. Towards this goal, we quantified the frequency, form and function of graphical representations on select state science tests. 985 tests items from 14 states were…

For one reason or another, various sources of information, namely, ancillary variables and correlational structure of the latent abilities, which are usually available in most testing situations, are ignored in ability estimation. A general model that incorporates these sources of information is proposed in this article. The model has a general…

Submicrorepresentations (SMR) could be an important element, not only for explaining the experimental observations to students, but also in the process of evaluating students' knowledge and identifying their chemical misconceptions. This study investigated the level of students' understanding of the solution concentration and the process of…

This book meets a demand in the science education community for a comprehensive and introductory measurement book in science education. It describes measurement instruments reported in refereed science education research journals, and introduces the Rasch modeling approach to developing measurement instruments in common science assessment domains,…

Surveys of the earth science content of all secondary (high school) science textbooks and related publications used in England and Wales have revealed high levels of error/misconception. The 29 science textbooks or textbook series surveyed (51 texts in all) showed poor coverage of National Curriculum earth science and contained a mean level of one…

This study investigated the use of performance-confidence relationships to signal the presence of alternative conceptions and inadequate problem-solving skills in mechanics. A group of 33 students entering physics at a South African university participated in the project. The test instrument consisted of 20 items derived from existing standardised…

The "Living Environment Regents Examination" is meant to provide a measure of the quality of New York State students' knowledge and understanding of biological content and science inquiry ability, as it is defined in the "MST Standards" and the "Living Environment Core Curriculum". This article examines the degree to…

This Information Capsule answers the most frequently asked questions about M-DCPS' academic performance during the 2011-2012 school year. Over the past year, the Florida Department of Education made over 28 changes to the school grading formula, including the transition to new, more rigorous assessments, new accountability components, and…

Operational testing programs employing item response theory (IRT) applications benefit from of the property of item parameter invariance whereby item parameter estimates obtained from one sample can be applied to other samples (when the underlying assumptions are satisfied). In theory, this feature allows for applications such as computer-adaptive…