National Trends in the Sources of Supply of Teachers in Special and General Education

This paper addresses the national quantity demand, supply, and shortage of special education teachers (SETs) in comparison to general education teachers (GETs). The main data source was the 1999-00 Schools and Staffing Survey. Results indicated that the total demand for SETs increased 38% from 240,000 in 1987-88 to 330,000 in 1999-00, a rate of growth greater than the 26% increase observed for GETs. For entering teachers, the reserve pool was the predominant source of supply of both SETs and GETs. However, only 46% of first-time SETs completed extensive teacher preparation with degree majors in their primary areas of teaching, whereas the comparable figure for GETs was 82%. As an indication of the inadequate supply of extensively prepared teachers in special education, about 28% of first-time teachers hired in special education positions had completed teacher preparationi in generale education. Finally, a modest decline in the supply of degree graduates in special education has occurred since 1997-98 in spite of the increasing quantity demand for entering SETs

The Chronic and Increasing Shortage of Fully Certified Teachers in Special and General Education

This study addresses the chronic and increasing national shortage of fully certified special education teachers (SETs) in comparison with general education teachers (GETs). The data sources were the 1987–1988 through 1999–2000 Schools and Staffing Surveys and the Data Analysis System for special education for school years 1987–1988 through 2001–2002. The study found that (a) the shortage of fully certified SETs increased from 7.4% in 1993–1994 to 12.2% in 2001–2002 (2%–4% greater than the shortage of fully certified GETs), (b) the number of additional fully certified SETs needed almost doubled from 25,000 in 1993–1994 to 49,000 in 2001–2002, (c) the shortage of fully certified teachers was exacerbated by entering teachers (only 44.4% of entering SETs were fully certified), and (d) only 53.1% of first-time entering SETs with extensive teacher preparation were fully certified

Does Teacher Preparation Matter for Beginning Teachers in Either Special or General Education?

The current U.S. Department of Education (USDOE) emphasis on the preparation of teachers in content knowledge, and de-emphasis on pedagogy and teaching practicums, constitutes a major issue concerning how best to prepare a sufficient supply of highly qualified teachers. By contrast, federal policy represented by the 2001 No Child Left Behind Act (NCLB) emphasizes both full certification and content knowledge. Our research was based on data from the Schools and Staffing Survey for beginning teachers in both special and general education (separately). Results showed that extensive preparation in pedagogy and practice teaching was more effective than was only some or no preparation in producing beginning teachers who (a) were fully certified, (b) secured in-field teaching assignments, and (c) reported being well prepared to teach subject matter and well prepared with respect to pedagogical skills. Thus, contrary to the USDOE perspective emphasizing preparation in content knowledge, extensive preparation in pedagogy and practice teaching contributed to the attainment of the two key NCLB indicators of a highly qualified teacher: full certification and in-field teaching

Teacher Turnover: Examining Exit Attrition, Teaching Area Transfer, and School Migration

The purposes of this research were to quantify trends in three components of teacher turnover and to investigate claims of excessive teacher turnover as the predominant source of teacher shortages. Attrition and teaching area transfer rates were comparable in special and general education and increased substantially from 1991-1992 to 2000-2001. School migration was stable over years, but higher in special than general education. Although annual turnover was high and increased to 1 in 4 teachers (25.6%) by 2000-2001, teacher attrition was lower than in other occupations. Evidence suggests that retention is unlikely to increase without dramatic improvements in the organization, management, and funding of public schools. Until then, an increased supply of qualified teachers is needed to reduce teacher shortages

Direct Spectrum of the Benchmark T Dwarf HD 19467 B

HD 19467 B is presently the only directly imaged T dwarf companion known to induce a measurable Doppler acceleration around a solar-type star. We present spectroscopy measurements of this important benchmark object taken with the Project 1640 integral field unit at Palomar Observatory. Our high-contrast R ≈ 30 observations obtained simultaneously across the JH bands confirm the cold nature of the companion as reported from the discovery article and determine its spectral type for the first time. Fitting the measured spectral energy distribution to SpeX/IRTF T dwarf standards and synthetic spectra from BT-Settl atmospheric models, we find that HD 19467 B is a T5.5 ± 1 dwarf with effective temperature T_eff=978^(+20)_(-43) K. Our observations reveal significant methane absorption affirming its substellar nature. HD 19467 B shows promise to become the first T dwarf that simultaneously reveals its mass, age, and metallicity independent from the spectrum of light that it emits

Association of Accelerometry-Measured Physical Activity and Cardiovascular Events in Mobility-Limited Older Adults: The LIFE (Lifestyle Interventions and Independence for Elders) Study.

BACKGROUND:Data are sparse regarding the value of physical activity (PA) surveillance among older adults-particularly among those with mobility limitations. The objective of this study was to examine longitudinal associations between objectively measured daily PA and the incidence of cardiovascular events among older adults in the LIFE (Lifestyle Interventions and Independence for Elders) study. METHODS AND RESULTS:Cardiovascular events were adjudicated based on medical records review, and cardiovascular risk factors were controlled for in the analysis. Home-based activity data were collected by hip-worn accelerometers at baseline and at 6, 12, and 24 months postrandomization to either a physical activity or health education intervention. LIFE study participants (n=1590; age 78.9±5.2 [SD] years; 67.2% women) at baseline had an 11% lower incidence of experiencing a subsequent cardiovascular event per 500 steps taken per day based on activity data (hazard ratio, 0.89; 95% confidence interval, 0.84-0.96; P=0.001). At baseline, every 30 minutes spent performing activities ≥500 counts per minute (hazard ratio, 0.75; confidence interval, 0.65-0.89 [P=0.001]) were also associated with a lower incidence of cardiovascular events. Throughout follow-up (6, 12, and 24 months), both the number of steps per day (per 500 steps; hazard ratio, 0.90, confidence interval, 0.85-0.96 [P=0.001]) and duration of activity ≥500 counts per minute (per 30 minutes; hazard ratio, 0.76; confidence interval, 0.63-0.90 [P=0.002]) were significantly associated with lower cardiovascular event rates. CONCLUSIONS:Objective measurements of physical activity via accelerometry were associated with cardiovascular events among older adults with limited mobility (summary score >10 on the Short Physical Performance Battery) both using baseline and longitudinal data. CLINICAL TRIAL REGISTRATION:URL: http://www.clinicaltrials.gov. Unique identifier: NCT01072500

The experience of health in an unequal society

The Politics of Food and Healt

LSST Science Book, Version 2.0

A survey that can cover the sky in optical bands over wide fields to faint magnitudes with a fast cadence will enable many of the exciting science opportunities of the next decade. The Large Synoptic Survey Telescope (LSST) will have an effective aperture of 6.7 meters and an imaging camera with field of view of 9.6 deg^2, and will be devoted to a ten-year imaging survey over 20,000 deg^2 south of +15 deg. Each pointing will be imaged 2000 times with fifteen second exposures in six broad bands from 0.35 to 1.1 microns, to a total point-source depth of r~27.5. The LSST Science Book describes the basic parameters of the LSST hardware, software, and observing plans. The book discusses educational and outreach opportunities, then goes on to describe a broad range of science that LSST will revolutionize: mapping the inner and outer Solar System, stellar populations in the Milky Way and nearby galaxies, the structure of the Milky Way disk and halo and other objects in the Local Volume, transient and variable objects both at low and high redshift, and the properties of normal and active galaxies at low and high redshift. It then turns to far-field cosmological topics, exploring properties of supernovae to z~1, strong and weak lensing, the large-scale distribution of galaxies and baryon oscillations, and how these different probes may be combined to constrain cosmological models and the physics of dark energy.Comment: 596 pages. Also available at full resolution at http://www.lsst.org/lsst/sciboo

The mirror neuron system as revealed through neonatal imitation: presence from birth, predictive power, and evidence of plasticity

There is strong evidence that neonates imitate previously unseen behaviors. These behaviors are predominantly used in social interactions, demonstrating neonates’ ability and motivation to engage with others. Research on neonatal imitation can provide a wealth of information about the early mirror neuron system (MNS): namely, its functional characteristics, its plasticity from birth, and its relation to skills later in development. Though numerous studies document the existence of neonatal imitation in the laboratory, little is known about its natural occurrence during parent-infant interactions and its plasticity as a consequence of experience. We review these critical aspects of imitation, which we argue are necessary for understanding the early action-perception system. We address common criticisms and misunderstandings about neonatal imitation and discuss methodological differences among studies. Recent work reveals that individual differences in neonatal imitation positively correlate with later social, cognitive, and motor development. We propose that such variation in neonatal imitation could reflect important individual differences of the MNS. Although postnatal experience is not necessary for imitation, we present evidence that neonatal imitation is influenced by experience in the first week of life

Comparative and demographic analysis of orang-utan genomes

Orang-utan- is derived from a Malay term meaning man of the forest- and aptly describes the southeast Asian great apes native to Sumatra and Borneo. The orang-utan species, Pongo abelii (Sumatran) and Pongo pygmaeus (Bornean), are the most phylogenetically distant great apes from humans, thereby providing an informative perspective on hominid evolution. Here we present a Sumatran orang-utan draft genome assembly and short read sequence data from five Sumatran and five Bornean orang-utan genomes. Our analyses reveal that, compared to other primates, the orang-utan genome has many unique features. Structural evolution of the orang-utan genome has proceeded much more slowly than other great apes, evidenced by fewer rearrangements, less segmental duplication, a lower rate of gene family turnover and surprisingly quiescent Alu repeats, which have played a major role in restructuring other primate genomes. We also describe a primate polymorphic neocentromere, found in both Pongo species, emphasizing the gradual evolution of orang-utan genome structure. Orang-utans have extremely low energy usage for a eutherian mammal, far lower than their hominid relatives. Adding their genome to the repertoire of sequenced primates illuminates new signals of positive selection in several pathways including glycolipid metabolism. From the population perspective, both Pongo species are deeply diverse; however, Sumatran individuals possess greater diversity than their Bornean counterparts, and more species-specific variation. Our estimate of Bornean/Sumatran speciation time, 400,000years ago, is more recent than most previous studies and underscores the complexity of the orang-utan speciation process. Despite a smaller modern census population size, the Sumatran effective population size (N e) expanded exponentially relative to the ancestral N e after the split, while Bornean N e declined over the same period. Overall, the resources and analyses presented here offer new opportunities in evolutionary genomics, insights into hominid biology, and an extensive database of variation for conservation efforts. © 2011 Macmillan Publishers Limited. All rights reserved