This study investigated successful teaching practices carried out within 45-minute Mathematics classes of the MATATAG curriculum, in accordance with the FICS Model: Financial, Instructional, Chronological, and Social. Using a qualitative grounded theory approach, the study purposively chose trained Mathematics teachers in Cebu, Philippines, and gathered data through semi-structured interviews. Specifically, teachers’ responses to time pressure, facilities, and learner diversity were educational challenges focused on. The thematic analysis also provided insights into four themes: optimal combinations and variations in resource usage and deployment, strategic inclusive teaching, systematic and sequential presentation of lesson aspects, and integrated, active, culturally relevant teaching. The findings indicated that teachers combined collaborative and adaptive methodologies seamlessly, solved language barriers, and emphasized the content to engage students and reach the learning goals. The research recommends that the Department of Education enhances teachers’ efficiency and effectiveness by resourcing and training them on flexible strategies that foster the delivery of wholesome, inclusive, and quality lessons in a limited time.