Els models, organitzadors del currícul en biologia

Es presenta una proposta d'organització del currículum de biologia basada en determinats models teòrics. Hi justifiquem la seva idoneïtat i validesa i presentem alguns dels resultats de la seva aplicació a l'aula

Características de los ejercicios de prácticas de laboratorio incluidos en los libros de textos de Ciencias utilizados en Cataluña

The laboratory exercices in science textbooks used in grades 9 to 12 in Catalonian schools were content analyzed by three instruments: The Inquiry Leve1 Index (ILI), the Laboratory Assessment Inventory (LAI) and the Laboratory Dimenssions Inventory (LDI). The analysis was carried out by 24 teachers under the guidance of two science educators as an assignment in an in-service course on teaching and evaluation in the laboratory. It was found that the number of laboratory exercises offered in Catalonian science texbooks is rather small compared with texbooks in countries such as the U. K. and U.S.A. Most of the exercises are of low inquiry level featuring manipulation but missing high other inquiry skills such as formulating questions and hypotheses, designing experiments, etc. The relationship between practical work and theory is hardly indicated and the potential of the laboratory as a means to enhancing concept learning andlor developing social skills are hardly being considered. There is an urgent need to reform laboratory work in Catalonian schools

L'ús d'animacions-TIC a la classe de biologia

Les animacions que trobem a les webs són un nou recurs didàctic del que disposem els ensenyants per promoure l'aprenentatge dels nostres alumnes. Però la seva eficàcia passa per saber quins són els aspectes del seu disseny que poden afavorir l'aprenentatge i quines són les millors maneres d'utilitzar-les a l'aula. En aquest article es resumeix una recerca, disponible a la xarxa, en la que s'han analitzat aspectes com: a) Característiques del disseny de les "animacions" que millor poden afavorir l'aprenentatge, b) Ús que en fa el professorat, i c) Ús que en fa l'alumnat

Un modelo didáctico para la Formación Inicial del Profesorado de Ciencias

En este artículo se discuten los componentes -epistemológico, psicológico y socio-pedagógico- de un modelo de formación inicial del profesorado de ciencias para la secundaria, que se ha venido desarrollando en el CAP de la Universitat Autónoma de Barcelona. A modo de ejemplo, se presenta una secuencia de aprendizaje que permite hacerse una idea de cómo se concreta este modelo en el aula de «Didáctica de las Ciencias Naturales».This article discusses the epistemological, psychological and socio - pedagogical components of a preservice secondary science teacher training model. The model is being developed at CAP of Universitat Autónoma de Barcelona. As an example, a learning sequence is presented for understanding how this model is applied at «Science Teaching» course

The effects of sildenafil citrate on the fetoplacental development and hemodynamics in a rabbit model of intrauterina growth restriction

The present study evaluated the effectiveness of sildenafil citrate (SC) to improve placental and fetal growth in a diet-induced rabbit model of intrauterine growth restriction (IUGR). Pregnant rabbits were fed either ad libitum (Group C) or restricted to 50% of dietary requirements (Group R) or restricted and treated with SC (Group SC). The treatment with SC improved placental development by increasing vascularity and vessel hypertrophy in the decidua. The assessment of feto–placental haemodynamics showed higher resistance and pulsatility indices at the middle cerebral artery (MCA) in fetuses treated with SC when compared with Group R, which had increased systolic peak and time-averaged mean velocities at the MCA. Furthermore, fetuses in the SC group had significantly higher biparietal and thoracic diameters and longer crown–rump lengths than fetuses in Group R. Hence, the SC group had a reduced IUGR rate and a higher kit size at birth compared with Group R. In conclusion, SC may provide potential benefits in pregnancies with placental insufficiency and IUGR, partially counteracting the negative effects of food restriction on placental development and fetal growth. However, the present study also found evidence of a possible blood overflow in the brain that warrants further investigation

SARS-CoV-2 Catalonia contact tracing program : evaluation of key performance indicators

Background: Guidance on SARS-CoV-2 contact tracing indicators have been recently revised by international public health agencies. The aim of the study is to describe and analyse contact tracing indicators based on Catalonia's (Spain) real data and proposing to update them according to recommendations. Methods: Retrospective cohort analysis including Catalonia's contact tracing dataset from 20 May until 31 December 2020. Descriptive statistics are performed including sociodemographic stratification by age, and differences are assessed over the study period. Results: We analysed 923,072 contacts from 301,522 SARS-CoV-2 cases with identified contacts (67.1% contact tracing coverage). The average number of contacts per case was 4.6 (median 3, range 1-243). A total of 403,377 contacts accepted follow-up through three phone calls over a 14-day quarantine period (84.5% of contacts requiring follow-up). The percentage of new cases declared as contacts 14 days prior to diagnosis evolved from 33.9% in May to 57.9% in November. All indicators significantly improved towards the target over time (p < 0.05 for all four indicators). Conclusions: Catalonia's SARS-CoV-2 contact tracing indicators improved over time despite challenging context. The critical revision of the indicator's framework aims to provide essential information in control policies, new indicators proposed will improve system delay's follow-up. The study provides information on COVID-19 indicators framework experience from country's real data, allowing to improve monitoring tools in 2021-2022. With the SARS-CoV-2 pandemic being so harmful to health systems and globally, is important to analyse and share contact tracing data with the scientific community

Corrigendum to ‘a horizon scan exercise for aquatic invasive alien species in Iberian inland waters’

info:eu-repo/semantics/publishedVersio

Marco activo de recursos de innovación docente: Madrid

Una guía de espacios e instituciones para actividades educativas complementarias en enseñanza secundaria y Formación Profesional