The pedagogical approach-Content and Language Integrated Learning (CLIL)-has been widely adopted around the globe with its dual aims of developing students' second language (L2) proficiency and mastering content knowledge simultaneously. However, its effectiveness remains inconsistent. This inconsistency has led researchers to call for an investigation into the perspectives of CLIL students to understand the factors behind the success and failure of CLIL implementation. To address this gap, this study explores CLIL students' perspectives through the lens of self-regulation and examines the relationships between CLIL students' self-regulation levels, linguistic challenges, and learning outcomes. Involving 167 junior secondary students from three schools in Hong Kong that adopted different CLIL models in Hong Kong, the study revealed moderate self-regulation levels and varying linguistic challenges among CLIL students, with listening being identified as the most difficult skill. A significant, moderately positive correlation was found between self-regulation levels and perceived linguistic challenges. Multiple regression analysis also found that motivation was a key predictor of both L2 proficiency and content subject achievement, while other self-regulation constructs (self-preparation, self-monitoring, and self-reflection) showed non-significant predictive values. Pedagogical implications are provided to develop students' self-regulation skills and address perceived linguistic challenges, ultimately enhancing the learning experience and outcomes for CLIL students of diverse abilities. Copyright © 2025 Taylor and Francis Ltd.

The enactment of the revised School Places Allocation Systems at the compulsory stage in 2004 had the aim of desegregating Hong Kong's non-Chinese linguistic minority (NCLM) students by including them into ethnic Chinese-dominated mainstream primary and secondary schools. Because of the presumed cause-consequence relationship between desegregated school participation and academic achievement, in specific second language Chinese (CSL) acquisition, the challenges that such students face in participating in mainstream education and learning Chinese, no doubt, deserve to be examined. This qualitative study conducted in-depth interviews with 18 secondary students of South Asian/Southeast Asian minority backgrounds enrolled in mainstream schools. Drawing on both cultural and institutional paradigms of explanation for educational achievement, we argue that the reasons inhibiting the minority students' academic involvement are not simply their linguistic challenges but also the institutional constraints in the mainstream education system unique to this population. This study calls for a shift in school desegregation arrangement from one focusing narrowly on physical desegregation to a more comprehensive set of policies that embrace the institutional factors including teacher expectation, resource availability, and bilingual support, crucial to reduce racial differences in achievement.