محمدباقر شبانی

In- service professional development activities seem to be of much significance to teachers who face challenges in teaching or teaching related issues such assessment and curriculum development. Despite the rich literature review of teachers' professional development, in-service professional development needs of EFL teachers have not been assessed yet. The present study aimed at developing and validating an in-service professional development needs scale for EFL teachers. In doing so, a mixed research method was used. In the qualitative phase, the professional development needs were explored through interviewing with 20 EFL teachers who were selected through purposive sampling. In the quantitative phase, the professional development scale was submitted to 220 teachers. Data were analyzed through running exploratory factor analysis and Cronbach's alpha. Results showed that extracted professional development needs were reduced to four main areas: a) teaching, communication skills and assessment, b) educational psychology and technology, c) material development, and d) language and meta-language skills. The findings can be used by language schools and educational centers to provide EFL teachers with the most urgent professional development needs.