The purpose of this research is to investigate English teachers' perception and challenges of the implementation of ICT in ELT classrooms. This study used mixed methods, qualitative and quantitative in nature. A purposive sampling technique was used to select the study subjects, who are 26 English teachers from 16 public senior high schools in Banda Aceh. Questionnaires and interviews were used to collect data. The data were analysed and interpreted through qualitative and quantitative procedures. The results showed that the English teachers found ICT very helpful in teaching. However, the limited time and tools, coupled with a poor Internet connection as well as a lack of knowledge and experience of ICT training were obstacles for the teachers using ICT. The results of this study give meaningful insights for policy makers in relation to the implementation of ICT for teaching and learning in the classroom.