Measurement in Elementary Science

Ten year olds have great difficulty drawing the human face and form in proportion. To see if that skill could be enhanced, our fifth grade class set out to explore human proportion and measurements using metric rulers, meter sticks, graph paper and helpful partners

Mathematics, mastery and metacognition: how adding a creative approach can support children in maths

Background: Children who hold an incremental view of ability show greater perseverance, improved help-seeking skills and are better able to cope with unexpected challenges. Classroom instruction can influence how children view themselves as learners. Aim: To explore how mastery-orientated classroom instruction, collaborative learning and metacognitive reflection can foster learners’ attitudes to their task performance. We hypothesised that using a mastery-oriented approach within a mathematics curriculum encourages metacognition, improves motivation and helps children achieve an underlying understanding of mathematical concepts thus improving mathematics performance. Method: This paper reports an 11-week project aiming to embed problem-solving strategies within a mastery-oriented whole-class environment. Children completed pre- and post-task semi-structured interviews and maths problems in addition to the 11-week collaborative maths project. Participants were 24 children from a rural primary school in East Sussex, 12 boys and 12 girls (mean age 8 years and 9 months). The interviews are presented qualitatively and a repeated measures analysis of variance on mathematics motivation and performance was conducted. Findings: The learners showed increased metacognitive reflection on learning strategies as well as increases in girls’ motivation for mathematics. Limitations: This is a small sample size and, being conducted within a typical everyday classroom, there were several uncontrolled variables. Although change was evident in both attitude and maths scores, it was difficult to apportion added value to the different variables contributing to the change in maths scores. Conclusions: Challenging children’s perceptions of mathematics encouraged greater self-reflection and increased motivation for girls

Mortality in over 350,000 Insured Swedish Dogs from 1995–2000: II. Breed-Specific Age and Survival Patterns and Relative Risk for Causes of Death

This study continues analysis from a companion paper on over 350,000 insured Swedish dogs up to 10 years of age contributing to more than one million dog-years at risk during 1995–2000. The age patterns for total and diagnostic mortality and for general causes of death (trauma, tumour, locomotor, heart and neurological) are presented for numerous breeds. Survival estimates at five, eight and 10 years of age are calculated. Survival to 10 years of age was 75% or more in Labrador and golden retrievers, miniature and toy poodles and miniature dachshunds and lowest in Irish wolfhounds (91% dead by 10 years). Multivariable analysis was used to estimate the relative risk for general and more specific causes of death between breeds accounting for gender and age effects, including two-way interactions. Older females had tumour as a designated cause of death more often than males in most breeds, but not in the Bernese mountain dog. Information presented in this and the companion paper inform our understanding of the population level burden of disease, and support decision-making at the population and individual level about health promotion efforts and treatment and prognosis of disease events

Mortality in over 350,000 Insured Swedish dogs from 1995–2000: I. Breed-, Gender-, Age- and Cause-specific Rates

This study presents data on over 350,000 insured Swedish dogs up to 10 years of age contributing to over one million dog-years at risk (DYAR) during 1995–2000. A total of 43,172 dogs died or were euthanised and of these 72% had a claim with a diagnosis for the cause of death. The overall total mortality was 393 deaths per 10,000 DYAR. Mortality rates are calculated for the 10 most common breeds, 10 breeds with high mortality and a group including all other breeds, crudely and for general causes of death. Proportional mortality is presented for several classifications. Five general causes accounted for 62% of the deaths with a diagnosis (i.e. tumour (18%), trauma (17%), locomotor (13%), heart (8%) and neurological (6%)). Mortality rates for the five most common diagnoses within the general causes of death are presented. These detailed statistics on mortality can be used in breed-specific strategies as well as for general health promotion programs. Further details on survival and relative risk by breed and age are presented in the companion paper [14]

In vivo biological activity of the components of haematoporphyrin derivative.

The in vivo biological activity of various fractions and components of haematoporphyrin derivative (HpD) have been determined by measuring the depth of necrosis of implanted tumours in mice exposed to light after the administration of standard doses of porphyrins dissolved in alkali. In this assay, haematoporphyrin, hydroxyethylvinyldeuteroporphyrin and protoporphyrin are inactive, but the mono- and di-acetates of haematoporphyrin (which are major components of HpD) and acetoxyethylvinyldeuteroporphyrin are active. However, the situation appears to be more complex than this. The normal method for preparing HpD for injection involves an alkali treatment which causes hydrolysis and elimination of the acetoxy functions, and the only recognized products (haematoporphyrin, hydroxyethylvinyldeuteroporphyrin and protoporphyrin) are inactive in the in vivo assay. It is concluded that the active component here is a porphyrin, possibly a dimer or oligomer, which is retained on the column during the normal separation by HPLC. This conclusion is supported by the observations that (i) the crude material obtained from the spent column is active without further alkali treatment, and (ii) activity develops over 30 min, when HpD or the mono- or diacetates of haematoporphyrin are treated with sodium bicarbonate in aqueous DMSO. The advantages of working with a pure substance (e.g. haematoporphyrin diacetate) rather than a mixture (HpD) are stressed

Demonstration Classrooms: A Thematic Approach to Science/Mathematics Integration

A fundamental principle of ecology is that everything is interconnected. This observation holds true in the academic as well as the natural world; if we study an environmental issue in depth, we find that it cannot be resolved by means of any single discipline. Environmental studies transcend all disciplines so as to include the sciences, mathematics, technology, social studies, language arts and the practical and fine arts. The science component, ecology, is itself an integrating rather than a splintering science. It draws together the traditionally separate disciplines of biology, chemistry, physics and earth science. Mathematics provides a tool for quantifying and interpreting the data obtained through experimentation and observation

Prescribing Medications for Chronic Pain Management: The State of Education in Florida Medical Schools and Residency Programs

The purpose of this study was to assess the state of chronic, non-cancer pain management education in Florida medical schools and residency programs. Surveys were developed and distributed to Florida allopathic and osteopathic medical schools. One survey was specific to students and residents and one to faculty. Confidence in their general education, as well as in treating patients with chronic, non-cancer pain, was measured. A majority of medical students and residents (59.5%), in addition to a majority of faculty (58.1%), agreed or strongly agree that more clinical time needs to be dedicated to chronic, non-cancer pain management education. Students, residents, and faculty suggested offering more lectures, online modules, workshops, and clinical scenarios as ways to improve the current educational environment. Results demonstrate that while Florida medical schools and residency programs provide education on chronic, non- cancer pain management, there is still room for improvement. Increased communication between institutions and standardizing competencies related to pain management may prove beneficial