This study aimed to determine the readiness level of the Grade 10 Mathematics teachers using a validated questionnaire-checklist. The participants of the study were twenty-one (21) Grade 10 Mathematics Teachers of the top five (5) biggest schools located at Iloilo City. The questionnaire-checklist is composed of three parts: Part I – socio-demographic profile of the participants; Part II – the questionnaire proper, which contains statements regarding the readiness level of the Grade 10 Mathematics Teachers in using the modules prescribed by the Department of Education (DepEd); and Part III – an open-ended question about the challenges encountered by the teachers in using the modules. There were fifty (50) items in the questionnaire requiring the respondents to indicate a check mark (/) on the column corresponding to the answer of the participants’ choice. Each item is answerable with any of the following responses: Always, Often, Seldom and Never. The checklist was answered by the participants on the First and Second Week of October 2015. Statistics employed were mean and standard deviation for descriptive analysis, and Kruskal Wallis and Mann Whitney U-test for inferential analysis. The level of significant for inferential statistics was set at 0.05 alpha. Results of the study revealed that the participants of the study are very ready in using the Grade 10 Mathematics modules regardless of their length of service and participation in seminars in teaching the subject. Findings of the study further revealed that there is no significant difference in the readiness level of the Mathematics teachers in using the Grade 10 modules in teaching Mathematics when classified according to number of years of teaching experience, and participation in seminars.