Jenny Denman

Dutch Summary (Translated)

1. Background and Problem Statement
Over the past three decades, Content and Language Integrated Learning (CLIL) has become one of the most prominent forms of bilingual education in Europe. While early research primarily highlighted the success of CLIL in academically selective tracks, it remained largely unknown whether and how CLIL could work for students with lower scholastic attainment. In the highly differentiated Dutch education system, bilingual education (TTO) using the CLIL approach emerged in the 1990s as a curricular innovation aimed at attracting motivated, academically strong students in pre-university (vwo) and later senior general (havo) tracks. Conversely, pre-vocational secondary education (vmbo)—which serves approximately half of the Dutch secondary school population—remained largely excluded from bilingual offerings.

This imbalance raised a broader ethical and pedagogical question: if CLIL can promote students' motivation and English language development, is it justifiable to reserve this approach only for academically selective tracks? In other words: can CLIL be both linguistically feasible and motivationally sustainable for less academically oriented students? This dissertation investigated this question by examining whether the core mechanisms of CLIL—meaningful exposure to English, a dual focus on content and language, and active student participation—can also work effectively in non-selective educational contexts with lower entry levels.

Because the data were collected between 2012 and 2014, when vmbo-CLIL was still in its infancy, the project documents the first generation of schools experimenting with this approach. These programs operated based on the first national standards for TTO at the vmbo level, where final attainment goals were adapted to the realistic linguistic and cognitive potential of vmbo students. Many students had multilingual backgrounds, reflecting the diversity characteristic of Dutch vmbo schools.

2. Potential Relevance and Research Gap
Lower-performing CLIL contexts like vmbo are sparsely researched and remain underrepresented in CLIL literature, which mostly stems from selective or higher-performing environments. This skewed research base has limited insight into the extent to which CLIL can contribute to educational equality across the full spectrum of secondary education. This dissertation therefore provides relevance at five levels: theoretical, policy-oriented, practical, social, and empirical.

3. Theoretical Framework
The conceptual foundation of this dissertation rests on three interconnected domains: CLIL pedagogy (the 4Cs framework: Content, Communication, Cognition, and Culture), social-cognitive models of learning motivation (Ajzen's Model of Planned Behavior), and international research on diversity and equity in bilingual education. This literature forms the basis for a twofold feasibility lens: linguistic feasibility (achievable progress in English proficiency) and attitudinal feasibility (the extent to which students and teachers experience CLIL as motivating and manageable).

4. Population and Context
The research took place within pre-vocational secondary education (vmbo), the largest segment of Dutch secondary education. The study followed approximately 600 students across 25 classes in seven schools, along with 53 teachers. The student population was highly diverse, reporting 44 different home languages. This setting was ideal for studying inclusive CLIL practices.

5. Research Design and Methodology
The dissertation used a mixed-methods research design with multiple sub-studies. Longitudinal quantitative analyses (multilevel growth modeling, ANCOVA, and change-score analyses) were combined with qualitative data (thematic analysis of questionnaires and focus group interviews) to provide an integrated picture of how CLIL works in vmbo contexts.

6. Summary of Findings
- Study 1: Found that CLIL participation strengthened students' perceived value and enjoyment of learning English. Positive motivation developed in inclusive classes without academic pre-selection, though the affective advantage waned as English exposure decreased in later years.
- Study 2: Showed that CLIL students scored significantly higher in receptive vocabulary and grammar than non-CLIL peers, with vocabulary growth strongly linked to periods of high English-medium instruction.
- Study 3: Revealed modest but statistically reliable advantages for CLIL students in productive skills (writing and speaking) and higher self-reported confidence in using English in school settings.
- Study 4: Qualitative insights showed that both teachers and students viewed English progress as the most positive aspect of CLIL. However, the quality of implementation varied significantly between schools, affecting students' engagement and clarity of understanding.

7. Integrated Findings
The synthesized results suggest that CLIL can function effectively in less academic contexts provided that the programs are adapted to the vmbo context. Success depends on varied, challenging, and communicatively rich opportunities, supported by teacher empathy and clear instructional scaffolding.

8. Implications
- Theoretical: The study confirms that dual-focus mechanisms can work outside selective settings if linguistic accessibility is balanced with cognitive challenge.
- Policy: Emphasizes the need for structural support, professional recognition, and institutional continuity rather than relying solely on local innovation.
- Pedagogical: Effective practices include strategic translanguaging, interactive tasks, and timely feedback to support both linguistic and affective engagement.

9. Current Situation and Future Outlook
While several pilot programs faced challenges or were discontinued due to systemic pressures, national policy has evolved toward a more structured and sustainable approach (TTO 2.0 Standard). The number of vmbo-CLIL programs more than doubled between 2012 and 2024. Future initiatives aim to position English as a tool for global citizenship and inclusion.

10. Conclusion
The sub-studies show that CLIL can be both feasible and equitable for vmbo students. By documenting the formative years of vmbo-CLIL, this dissertation provides a foundation for understanding how bilingual learning can be realized in non-selective contexts, contributing to a more inclusive educational landscape.