The Daily Lesson Log (DLL) is a standardized tool used by teachers of New Tubigon Elementary School to document and plan their day-to-day teaching activities. It helps ensure that lessons are well-structured, aligned with the curriculum, and responsive to the learners' needs. The DLL serves as a vital reference for instructional delivery and supports monitoring and supervision.

The use of DLL is guided by DepEd Order No. 42, s. 2016, which outlines the policy on daily lesson preparation for the K to 12 Basic Education Program. It allows teachers to use either DLLs or more detailed lesson plans depending on their level of experience and familiarity with the content. Its implementation is further supported by Republic Act 9155 (Governance of Basic Education Act of 2001), DepEd Order No. 70, s. 2012, and the Philippine Professional Standards for Teachers (PPST)—particularly under Domain 4: Curriculum and Planning. These legal bases affirm that lesson planning is a core professional responsibility that ensures quality teaching and learning outcomes.