The main objective of this study was to establish the criteria used by teachers in the selection of learning resources for language instruction in Secondary Schools in Kenya. The study was carried out in Secondary Schools in Uasin-Gishu County in Kenya. This research adopted descriptive survey design. Stratified random sampling was used to select one hundred and sixty eight secondary school teachers to take part in the study. Descriptive statistics were used to analyze data, which was presented in tables, describing the findings through frequencies and percentages, inferences were then made from the same. The findings showed that when selecting learning resources for use in language instruction, teachers were guided mostly by the lesson objectives; level of syllabus coverage; age of pupils, and topic of study.