Learning Through Reflection in Mathematics Teacher Education

This article is written from our perspective as both researchers and mathematics teacher educators, and describes how our knowledge has grown as we engage concurrently in both teaching and research. Reflection-on-action is a means for us of approaching the relationship between theory and practice that comes out of the development of our work as researchers and mathematics teacher educators. The article presents the different steps we have identified in the relationship between theory and practice during our professional development. In the discussion, we examine the whole sequence of steps showing what we have learnt. Afterwards, we use the sequence of activity of the reflective process as a framework in which we can operate and reflect about our own development.     

We can,we know how. But do we want to? Teaching attitudes towards ICT based on the level of technology integration in schools

Teachers’ attitudes towards technology are crucial to foster its use in schools and to improve its educational affordances and this is still a topic for research. This article relates the attitudes school teachers have towards information and communication technologies (ICT) with the different levels of technology integration in schools. A multiple case-study research methodology was applied, and in which the school was the unit of sampling used. Thirty-five schools from eight Spanish regions were selected, and 1222 questionnaires were collected, representing 78.9% of the sample. Three combined variables were utilised to classify schools in four different levels of technology integration. Results suggest level 4 school teachers exhibit better attitudes towards ICT, which results in creating a positive circle which improves the learning process. This becomes relevant for teacher education and professional development, as effective ICT integration in the classroom can perform as a catalyst for educational innovation.     

Evaluation of the teaching guide as an instrument for adaptation to the new European credit system： Case analysis

This paper presents the evaluation of the teaching guide application for the subject of management control in the Business Management and Administration Degree. The evaluation began with the analysis of a questionnaire which aimed to collect the perceptions of learners who have studied this subject in two groups （morning and afternoon） during the first semester of the current academic year. The intention of this analysis was to obtain information that would meet two objectives： to continue upgrading the teaching-learning process and to revise and improve all the components in the teaching guide. There is an analysis of the degree of difficulty involved in the activities proposed and the degree to which specific objectives for different competencies have been attained. Likewise, we have carried out a global assessment of the different methodologies applied in the teaching-learning process, and an assessment of the evaluation system as well as of other aspects that could have hindered reaching the objectives stated in the guide. Furthermore, the relevance of this questionnaire has been vindicated for obtaining the information necessary to adjust the learner＇s workload to the European credit.     

Predicting Language Development in Children At Risk: The Effects of Quality and Frequency of Caregiver Reading

Reading to children has been advocated as a way to enhance language and literacy skills (A. G. Bus, M. H. van IJzendoorn, & A. D. Pellegrini, 1995). However, little is known about reading with children under age 3 (K. L. Fletcher & E. Reese, 2005), particularly in at-risk samples (A. van Kleeck, 2003). In the current study of 87 primary caregivers and their 24-month-old children enrolled in an early intervention program, we tested a theoretical model of the relations among 24-month-old children's language, caregivers' reported frequency of reading with children, and caregivers' reading strategies on children's language and attention using path models. Path models indicated that caregivers' use of expansions and questions with their 24-month-old children during reading was related to children's expressive language at 30 months. Caregivers' use of labeling, expansions, and questions was related to 24-month-old children's attention during reading. Although children's language skills at 24 months were associated with the reported frequency of caregiver reading in the home, only caregivers' use of questions had a relationship with frequency of reading. Reading practices that promote language development and engagement during reading observed in this at- risk sample have implications for reading intervention efforts with young children.     

Clustering performances in the NBA according to players’ anthropometric attributes and playing experience

The aim of this study was: (i) to group basketball players into similar clusters based on a combination of anthropometric characteristics and playing experience; and (ii) explore the distribution of players (included starters and non-starters) from different levels of teams within the obtained clusters. The game-related statistics from 699 regular season balanced games were analyzed using a two-step cluster model and a discriminant analysis. The clustering process allowed identifying five different player profiles: Top height and weight (HW) with low experience, TopHW-LowE; Middle HW with middle experience, MiddleHW-MiddleE; Middle HW with top experience, MiddleHW-TopE; Low HW with low experience, LowHW-LowE; Low HW with middle experience, LowHW-MiddleE. Discriminant analysis showed that TopHW-LowE group was highlighted by two-point field goals made and missed, offensive and defensive rebounds, blocks, and personal fouls; whereas the LowHW-LowE group made fewest passes and touches. The players from weaker teams were mostly distributed in LowHW-LowE group, whereas players from stronger teams were mainly grouped in LowHW-MiddleE group; and players that participated in the finals were allocated in the MiddleHW-MiddleE group. These results provide alternative references for basketball staff concerning the process of evaluating performance.     

Control of clock signals

Precision and reliability of timescales are of importance in many situations, in particular in satellite navigation systems (i.e., Galileo system). Motivated by the necessity to improve the precision and the reliability of such clock signals, we have explored the possibility to exploit control theory in clock steering methods. First of all we provide a more robust theoretical framework for the analysis of the process. Two novel control algorithms are here proposed aiming to meet metrological specifications. Numerical simulations have been performed in order to evaluate the performances of the new control systems.     

Demand and innovation in services: The case of mobile communications

This paper aims to analyse the pricing strategies of mobile communications operators and examine the role of demand characteristics in the development of new tariff plans. In so doing, we depart from a traditional industrial organization approach to price discrimination and interpret new tariff plans as innovations. In the spirit of Schumpeter, we look at competition in this sector as depending upon this form of innovation, and we argue that, given the specific features of the industry, the development of new tariff plans is strongly related to the users’ characteristics and behaviour. Our main point is that in a context of uncertainty, demand affects firms’ innovative strategies in two ways: first, by providing information on user behaviour and by increasing the capability of market segmentation; and second, by providing the incentives to innovate. This argument is supported by an empirical analysis carried out on the basis of an original dataset which includes all the tariff plans on offer in the history of the Italian market between 1992 and 2005. We find that both a firm's installed customer base and the level of market saturation play a role in shaping firms’ innovative pricing strategies, in terms of the number and characteristics of the new tariff plans.     

Venture capital investment strategies under financing constraints: Evidence from the 2008 financial crisis

This paper employs the 2008 financial crisis as an empirical setting to examine how investment strategies of venture capitalists (VCs) vary in the presence of a liquidity supply shock, and what the performance implications of these strategies are for their portfolio startups. We show that while, on aggregate, funded startups receive no less financing during the financial crisis than in non-crisis times, VCs allocate relatively more resources to startups operating in the VCs’ core sectors. We show that this skew allocation follows from VCs choosing to double down on their core-sector investing, rather than by a changed mix of investors or startups during the financial crisis. These effects are strongest for early-stage startups, for which information problems are most severe. Furthermore, these results are driven by the investment strategies of more-experienced VCs. Building on these findings, we find superior ex post performance among crisis-funded portfolio startups operating in more-experienced VCs’ core sectors.     

Latent inhibition of conditioned disgust reactions in rats

The present experiments, using the latent inhibition (LI) paradigm, evaluated the effect of nonreinforced exposure to saccharin on the acquisition of an LiCl-induced saccharin aversion as measured by conditioned disgust reactions in the taste reactivity test and conditioned taste avoidance in a consumption test. When rats were preexposed to saccharin by bottle exposure (Experiments 1 and 3), LI was evidenced only by conditioned taste avoidance (bottle testing), but not by conditioned disgust reactions (intraoral [IO] testing). On the other hand, when rats were preexposed to saccharin by IO infusion (Experiments 2 and 3), LI was evidenced only by conditioned disgust reactions, but not by conditioned taste avoidance. Experiment 4 showed that LI of conditioned disgust reactions does not appear to be affected by a context shift from preexposure to testing phases. These results show that the expression of LI of both conditioned taste avoidance and conditioned disgust reactions depends critically on a common method of flavor exposure during preexposure and testing.