This document discusses mother tongue-based multilingual education (MLE) in the Philippines. It provides arguments for using students' first language as the primary medium of instruction, at least in the early grades, rather than exclusively using English. MLE has been shown to improve learning outcomes compared to English-only instruction by building on what students already know. The document also summarizes several studies, bills, and positions from government agencies and experts that support adopting MLE nationally rather than mandating English as the sole medium of instruction.