This study explores how students in a joint process of knowledge construction through the use of multilingual and multimodal resources in groups promotes the learning of scientific concepts in the context of laboratory work. Inductive qualitative discourse analysis was conducted to examine how students’ translanguage in a group completing tasks in two Grade 10 secondary science labs (biology and chemistry) in a Hong Kong EMI secondary school and how such a joint process of knowledge construction promotes the learning of scientific concepts. Using translanguaging as a theoretical framework, the analysis shows that even though schools have imposed an English-only policy, students use their linguistic and semiotic resources to both co-construct their scientific knowledge and practise their science apprenticeship. Translanguaging plays a role in mediating the students’ understanding of science, facilitating peer work and creating an enjoyable learning environment in the lab. The result implies that translanguaging as a pedagogical tool may create a space for content subject learning in Hong Kong EMI school setting. Copyright © 2021 Taylor & Francis Ltd.

This study examined the use of first language in English reading lessons and the perceptions of teachers and students towards it in three Hong Kong Chinese-medium secondary schools. The data comprised three teachers and sixty-three Form 2 students' participation and responses in (i) 3 classroom observations about how L1 was used in actual teaching and learning settings, (ii) survey forms gathering the frequency of participants using L1 teaching and learning strategies (based on the three teachers and nineteen selected students from the pool), and (iii) subsequent in-depth interviews concerning their perceptions about using L1 in English reading lessons. The findings revealed that (i) the use of L1 bottom-up language focused teaching strategies and condition-oriented teaching and learning strategies were effective for teaching and learning in English reading lessons and (ii) there was a negative relationship between students' proficiency in English and the use of L1. The study concluded that the use of first language in English reading lessons brought positive effects on the second language learning in English reading, especially when students' English proficiency and teaching contexts were taken into consideration. Copyright ©International Journal of Instruction.