The document is the 2013 K to 12 Curriculum Guide for Mother Tongue education in the Philippines from grades 1 to 3. It discusses the framework and principles of Mother Tongue-Based Multilingual Education (MTB-MLE) which uses the student's native language as the primary language of instruction to build literacy and develop higher-order thinking skills before additional languages are introduced. MTB-MLE aims to produce lifelong learners who are proficient in their first, second, and third languages to succeed academically and contribute to society. The guide provides standards and examples for teaching meaning and accuracy in listening, speaking, reading, writing, and viewing in both the primer track focused on correctness and the story track focused on meaning.