Nonlongitudinal Estimation of Growth Curve Parameters: The Cohort Growth Model

The cohort growth model (CGM) is a method for estimating the parameters of a latent growth model (LGM) based on cross-sectional data. The CGM models the interindividual differences in the growth rate, and it models how subjects’ growth rate is related to their initial status. We derive model identification for the CGM and illustrate, in a simulation study, that the CGM provides unbiased parameter estimates in most simulation conditions. Based on empirical data we compare the estimates of the CGM with the estimates of the LGM. The results were comparable for both models. Although the estimates of the (co)-variances were different, the estimates of both models led to similar conclusions on the developmental change. Finally, we discuss the advantages and limitations of the CGM, and we provide recommendations for its use in empirical research.     

Power,Language, and Ideology: Historical and Contemporary Notes on the Dismantling of Bilingual Education

The authors situate the politics of language surrounding the passage of California's Proposition 227, by discussing the historical and contemporary conditions that have led to the recent dismantling of bilingual education. They review the dynamics of power, language, and ideology since precolonial times, through the colonial period, the era of the Treaty of the Guadalupe Hidalgo, the process of Americanization, the Civil Rights decades, and up to the current 227 law. These are used to bear the point that the hegemonic bond of language is a continual thread that carries over to the new millennium, as we witness the spread of English-only legislation.     

Population education in the United States

The most significant expansion of population education in the U.S. has occurred over the past 5-year period. The environmental movement of the 1960 decade established a foundation on which population education quickly developed in the 1970 decade and gained acceptance in the population establishment and among funding agencies. During the years 1970-1976, several private organizations became actively involved in the population education field. Several viewpoints and population education approaches are now evident in the U.S. These approaches stress different aspects of the issue: extension of family planning, individual and social awareness, demography, behavioral objectives, value analysis, environmental strategy, and inquiry. Although these approaches are diverse, the U.S. has provided a basic framework for population education. Research in population education has consisted of little more than review studies, knowledge and attitude surveys, and several studies on the appropriateness of population education in the formal college school setting. Further research is needed to identify the goals, objectives, and strategy of population education, and these studies would have to be linked to the cognitive and moral development of the student.     

Enriching Professional Learning Networks: A Framework for Identification,Reflection, and Intention

Many educators in the 21st century utilize social media platforms to enrich professional learning networks (PLNs). PLNs are uniquely personalized networks that can support participatory and continuous learning. Social media services can mediate professional engagements with a wide variety of people, spaces and tools that might not otherwise be available. Teachers who once might have had access to only a handful of colleagues can now employ Facebook, Twitter and other mediums to learn from peers across the globe at any time. However, educators face numerous challenges building and enhancing their PLNs for professional growth. To support educators in the development of their PLNs, we present a framework for PLN enrichment. Rooted in our research and experiences with PLNs, this flexible framework is designed to help educators reflect upon how they might continuously improve their PLN experiences and outcomes.