Much attention is now given to academic language, particularly in content areas such as science, amid persistent achievement disparities between students classified as English Language Learners, and more recently, Long Term English Learners, and their English-proficient peers. This attention has fueled debate about the precise features of such…

Research on language classroom code-switching ranges from describing both teachers' and learners' first language and target language use to making connections between code-switching and student learning. However, few studies compare differences in practice between native and non-native speaker teachers and even fewer consider culture of learning…