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This paper reports on the findings in the first phase of a design-based research project as part of a large-scale intervention study in Dutch kindergartens. The project aims at enhancing differentiated instruction and evaluating its effects on children's development, in particular high-ability children. This study investigates relevant intervention fidelity factors based on [Fullan, M. (2007). "The New Meaning of Educational Change." New York: Teachers College Press]. A one-year intervention in 18 K-6 schools was conducted to implement the screening of children's entry characteristics, differentiation of (preparatory) mathematics and language curricula, and a policy for the differentiation and teaching high-ability children. The intervention fidelity and implementation process were scored for each school using data from observations, field notes and log books. Self-report questionnaires measured participants' perceptions of the intervention (n = 35 teachers, 18 principals). Quantitative results showed that intervention fidelity differed between schools. Qualitative analyses of perceptions and cross-case analyses of three kindergartens showed that a strong need, pressure from parents, an involved principal, and teacher time and motivation contributed to successful implementation. Implementation barriers were the innovation's complexity, teacher beliefs, an absent principal and low teacher motivation (which was partly due to communication problems). Implications for interventions in general and differentiated instruction for high-ability children in particular are discussed.

This article presents the findings from a teacher intervention in Dutch kindergartens aimed at improving teachers' differentiation practices (DP) to better anticipate student differences. The intervention was designed to improve the match between student levels and curricular activities, in particular for high-ability students and consists of three components. A pretest-posttest cluster randomised design was used with three conditions: control (n = 34), pilot intervention (n = 32) and improved intervention (n = 34). Quantitative results demonstrate that the intervention fidelity was relatively high in the improved intervention. Correlations confirmed that teacher-reported DP were higher in schools where the intervention was more completely implemented. DP were enhanced in both intervention conditions, but showed greater improvement in the improved intervention. Qualitative data revealed process characteristics that reflect problems schools encounter with this intervention. Teachers can be supported in improving DP, but this requires school-wide intensive and long support.

At the start of preschool, four-year-old pupils differ in their development, including in their capacity to self-regulate their playing and learning. In preschool and primary school, educational processes are generally adapted to the mean age of the pupils in the class. The same may apply to pupil-monitoring systems based on information and communication technology (ICT). This norm-based factor undermines the potential of ICT to support the educational differentiation needed for pupils and increases the amount of daily work for teachers. A theoretical framework is sketched in which pedagogical-didactical, organisational and ICT guidelines enhance differentiated, self-regulated playing and learning for each pupil within preschool and primary school. To develop and check such optimal education and ICT conditions in practice, a pilot and a randomised intervention study are carried out in integrated Dutch preschools/primary schools for pupils aged 4-12. Pilot results support the use of a procedure to screen each child's characteristics at the start of preschool by parents and preschool teachers, and also the immediate relevance of criterion-based and norm-based ordering ("double diagnostics") of playing and learning materials. Intermediate results of the longitudinal intervention study empirically support the hypothesis regarding the positive effects of optimal education on the cognitive and emotional functioning of both cognitively gifted and other pupils. The discussion emphasises the need to assist schools in realising optimal education, including learners' self-regulation and adequate ICT to enhance optimal learning. Final attention is given to further development of optimal education in a European context.

Background and purpose: This study examines secondary-school students' opinions on participating in authentic science projects which are part of an international EU project on climate change research in seven countries. Partnerships between schools and research institutes result in student projects, in which students work with and learn from scientists about the global carbon cycle. This study focuses in particular on differences between male and female students, as female students normally like traditional school science less than male students. Sample and design: Data, drawn from 1370 students from 60 secondary schools across Europe, were collected through questionnaires taken at the end of the projects. The evaluated aspects were: organization; enjoyment; difficulty; and impact of the projects. Results: The findings suggest that authentic science education is appreciated very much by both male students and even more by female students. The projects had positive impacts on climate change ideas, in particular for female students. Female students felt that they had learned many new things more often than male students. Conclusions: Both male and female students have positive opinions about the authentic science projects. The results further point to positive effects of activities in which students have an active role, like hands-on experiments or presentation of results. The findings are placed in the international context of science education and their implications for policy are discussed. (Contains 4 tables.)