Serang — Research on Content and Language Integrated Learning (CLIL), an educational approach combining subject content mastery with language acquisition, has reached its highest point globally in 2024. This was revealed in a bibliometric study conducted by Asdarina, Asep Muhyidin, and Yudi Juniardi from the Doctoral Program in Education at Sultan Ageng Tirtayasa University, published in 2026. The study mapped nearly two decades of CLIL research and found that the approach has become increasingly significant in modern education, particularly amid the growing demand for bilingual and multilingual learning systems.
CLIL has evolved beyond being just an alternative teaching model. It allows students to learn subjects such as science, mathematics, and social studies while simultaneously improving their foreign language skills, especially English. In Indonesia, this approach is gaining relevance as schools seek more contextual bilingual education models following changes in international-standard school policies.
To map this development, the researchers analyzed 143 Scopus-indexed journal articles published between 2007 and 2025 using VOSviewer software. The analysis tracked publication growth, keyword relationships, and thematic concentrations in CLIL research.
The findings showed a fluctuating but steadily increasing publication trend, with a major peak in 2024, reaching 20 publications. In its early years, CLIL research was still very limited, with only one article published in 2007, 2011, and 2012. This growth signals CLIL’s expanding role in international educational studies.
The study also found that most CLIL research focuses on primary and secondary school education. Common themes include students’ and teachers’ perceptions, long-term learning outcomes, writing skill development, and receptive language skills.
In the VOSviewer keyword network, “CLIL” emerged as the most dominant keyword with 55 occurrences. Closely connected themes included primary school, EFL, bilingual education, and motivation. This indicates that English learning and primary education remain central pillars in CLIL research.
According to Asdarina, the bibliometric map confirms that CLIL has built a strong academic foundation. However, new themes such as English, primary education, and motivation have emerged as fresh opportunities for future exploration, especially since they gained prominence after 2021.
The research also highlighted a practical paradox in CLIL implementation. While the theoretical framework emphasizes balance between content mastery and language development, in reality teachers often prioritize one over the other. This imbalance reflects challenges in curriculum design and teacher preparation, particularly in countries with rigid national education systems.
For Indonesia, the findings offer important insights into designing more effective bilingual learning systems. CLIL could help students improve language proficiency without sacrificing academic understanding, but its success depends heavily on teacher training, institutional support, and curriculum flexibility.
More broadly, the study reinforces the idea that CLIL is not a temporary trend but part of a larger transformation in global education toward more adaptive and integrated learning models. As global mobility increases, the ability to master both content and language simultaneously is becoming an essential 21st-century skill.
The researchers recommend future studies to focus on underexplored topics such as learning motivation, language policy, and primary education, which remain promising areas for further development.
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