This case study explored three Taiwanese elementary school English teachers' pedagogical and collaborative practice of glocalization in content and language integrated learning (CLIL) lessons. Based on the framework on English teachers' designs and implementing glocalized CLIL lessons, the thematic analysis of the documents, observations of classroom practices and post-observation conferences, and interviews reached the following conclusion. Firstly, food was the major glocalized CLIL topic. Secondly, these three English teachers had positive attitudes towards their multimodal presentations of glocalized CLIL lessons. Thirdly, these three teachers possessed different levels of English language skills in their collaborative lesson planning. Fourthly, these teachers faced challenges in providing their learners with authentic tasks for pushed output (learners' production of the language of learning and content knowledge for contextualized and meaningful use) and using English as the medium of instruction.