Students at the middle school level are expected to use appropriate tools and techniques, including mathematics and graphing, to analyze and interpret data and communicate experimental findings. Measures of central tendency (mean, median, and mode--see sidebar for definitions) are often used as descriptive statistics when students conduct…

The author presents an instrumental case study from an ethnographic research that examined how George, a student in one diverse fifth grade classroom, participated in a series of drama engagements to respond and construct meaning from the picture book "Friends from the other side/Amigos del otro lado" by G. Anzaldua (Children's Books Press,…

Three major investigations were conducted in an effort to determine the impact of home school regulations on educational enrollments in the United States. Home school regulations were obtained from state departments of education and investigated to determine the strength of the accountability measures. Populations representative of the school-age…

This undergraduate laboratory experiment integrates multiple techniques ("in vitro" synthesis, enzyme assays, Western blotting) to determine the production and detection sensitivity of two common reporter proteins (beta-galactosidase and luciferase) within an "Escherichia coli" S30 transcription/translation extract. Comparison of the data suggests…

Adolescent boys perceive their male peer group culture--and their socialization toward masculine norms emphasized within this culture--as negatively influencing their abilities to develop close male friendships. Boys who manage to develop close, male friendships, however, draw strength from these relationships to resist the social pressures of…

Narrative inquiry methodology was used to investigate self-perceived identities among 10 lesbian college students. Analysis of data from in-depth, open-ended interviews revealed the role of meaning-making capacity in determining the extent to which contextual influences shaped self-perceptions of sexual orientation identity and its relationship…

The procedure to produce standard curve for starch concentration measurement by image analysis using a color scanner and computer for data acquisition and color analysis is described. Color analysis is performed by a Visual Basic program that measures red, green, and blue (RGB) color intensities for pixels within the scanner image.

The Pearson correlation is used to depict effect sizes in the context of item response theory. Amultidimensional Rasch model is used to directly estimate the correlation between latent traits. Monte Carlo simulations were conducted to investigate whether the population correlation could be accurately estimated and whether the bootstrap method…

The student-assessment results that schools must report to satisfy No Child Left Behind (NCLB) requirements could be useful in pinpointing strengths and weaknesses in instructional programs and students' skills. However, many school staffs lack the expertise to learn from assessment results. We describe lessons learned from a yearlong workshop…

Accountability mandates such as No Child Left Behind (NCLB) have drawn attention to the practical use of student data for school improvement. Nevertheless, schools may struggle with these mandates because student data are often stored in forms that are difficult to access, manipulate, and interpret. Such access barriers additionally preclude the…

This article presents initial findings of a case study focusing on data use in five low-performing urban high schools undergoing comprehensive schoolwide reform. The case study investigates: (a) the ways in which disaggregated data can be used to examine progress and guide improvement in the process of restructuring urban, low-performing high…

This study focuses on the attitudes of a sample of Grade 9 mathematics teachers to the national mathematics Common Task Assessment (CTA) 2002 and to the official mathematics curriculum policy. The notion of pedagogic identity provided the theoretical lens to frame the study. These teachers' personal pedagogic identities are compared with official…

Missing data are a common practical problem for longitudinal designs. Time-series analysis is a longitudinal method that involves a large number of observations on a single unit. Four different missing-data methods (deletion, mean substitution, mean of adjacent observations, and maximum likelihood estimation) were evaluated. Computer-generated…

Much of the debate surrounding the use of contexts for pupils' writing focuses on the need for purpose, relevance and a sense of audience outwith the immediate classroom environment. This article seeks to explore whether there is any evidence to suggest that the use of enterprise in education may have a greater beneficial effect on the quality of…

Effect Sizes (ES) are an increasingly important index used to quantify the degree of practical significance of study results. This paper gives an introduction to the computation and interpretation of effect sizes from the perspective of the consumer of the research literature. The key points made are: (1) "ES" is a useful indicator of the…