This quasiexperimental study was conducted in order to see the impact of training in Information Communication Technology- (ICT-) assisted English language teaching on secondary school English language teachers’ knowledge, skills, and practice of using ICT tools for teaching English. To this end, a one group within-subject quasi-experimental design was applied. The study included 20 teachers from Hawassa City Administration in Sidama Regional State of Ethiopia using availability sampling. Repeated measures data were obtained using tests and questionnaires and analyzed quantitatively by using SPSS version 25. Friedman’s test was computed so as to compare the related samples’ mean scores for the tests as well as questionnaires. Related-samples Kendall’s coefficient of concordance was computed on the SPSS in order to see the magnitude of the effect of the training. The results showed training in ICT-assisted English language teaching significantly improves teachers’ knowledge and skills of ICT tools for teaching English and their practice of using ICT tools in teaching English. Recommendations were made in view of that. To be specific, there are needs for teacher training in information communication technology-supported English language teaching.